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Finding the Fourth Proportional to 438,258.88, 657,390.21 and 138,740.91

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Solution

The fourth proportional to 438,258.88, 657,390.21 and 138,740.91 is: 208,111.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,258.88 : 657,390.21 = 138,740.91 : x
  2. Step 2: Convert to fraction form
    438,258.88/657,390.21 = 138,740.91/x
  3. Step 3: Cross multiply
    438,258.88x = 657,390.21 × 138,740.91
  4. Step 4: Simplify right side
    438,258.88x = 91,206,915,960.49
  5. Step 5: Solve for x
    x = 91,206,915,960.49/438,258.88
  6. Step 6: Final answer
    x = 208,111.96

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