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Finding the Fourth Proportional to 438,469.28, 657,722.40 and 138,943.28

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Solution

The fourth proportional to 438,469.28, 657,722.40 and 138,943.28 is: 208,420.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,469.28 : 657,722.40 = 138,943.28 : x
  2. Step 2: Convert to fraction form
    438,469.28/657,722.40 = 138,943.28/x
  3. Step 3: Cross multiply
    438,469.28x = 657,722.40 × 138,943.28
  4. Step 4: Simplify right side
    438,469.28x = 91,386,107,585.47
  5. Step 5: Solve for x
    x = 91,386,107,585.47/438,469.28
  6. Step 6: Final answer
    x = 208,420.78

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