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Finding the Fourth Proportional to 399,682.88, 599,951.12 and 172,091.12

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Solution

The fourth proportional to 399,682.88, 599,951.12 and 172,091.12 is: 258,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,682.88 : 599,951.12 = 172,091.12 : x
  2. Step 2: Convert to fraction form
    399,682.88/599,951.12 = 172,091.12/x
  3. Step 3: Cross multiply
    399,682.88x = 599,951.12 × 172,091.12
  4. Step 4: Simplify right side
    399,682.88x = 103,246,260,186.05
  5. Step 5: Solve for x
    x = 103,246,260,186.05/399,682.88
  6. Step 6: Final answer
    x = 258,320.45

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