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Finding the Fourth Proportional to 408,957.31, 613,561.16 and 209,418.97

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Solution

The fourth proportional to 408,957.31, 613,561.16 and 209,418.97 is: 314,192.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,957.31 : 613,561.16 = 209,418.97 : x
  2. Step 2: Convert to fraction form
    408,957.31/613,561.16 = 209,418.97/x
  3. Step 3: Cross multiply
    408,957.31x = 613,561.16 × 209,418.97
  4. Step 4: Simplify right side
    408,957.31x = 128,491,346,159.21
  5. Step 5: Solve for x
    x = 128,491,346,159.21/408,957.31
  6. Step 6: Final answer
    x = 314,192.56

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