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Finding the Fourth Proportional to 689,561,978.40, 1,034,846,852.40 and 485,488,634.40

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Solution

The fourth proportional to 689,561,978.40, 1,034,846,852.40 and 485,488,634.40 is: 728,587,713.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,561,978.40 : 1,034,846,852.40 = 485,488,634.40 : x
  2. Step 2: Convert to fraction form
    689,561,978.40/1,034,846,852.40 = 485,488,634.40/x
  3. Step 3: Cross multiply
    689,561,978.40x = 1,034,846,852.40 × 485,488,634.40
  4. Step 4: Simplify right side
    689,561,978.40x = 502,406,385,184,814,336
  5. Step 5: Solve for x
    x = 502,406,385,184,814,336/689,561,978.40
  6. Step 6: Final answer
    x = 728,587,713.54

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