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Finding the Fourth Proportional to 528,739.20, 729,661.04 and 287,021.94

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Solution

The fourth proportional to 528,739.20, 729,661.04 and 287,021.94 is: 396,090.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,739.20 : 729,661.04 = 287,021.94 : x
  2. Step 2: Convert to fraction form
    528,739.20/729,661.04 = 287,021.94/x
  3. Step 3: Cross multiply
    528,739.20x = 729,661.04 × 287,021.94
  4. Step 4: Simplify right side
    528,739.20x = 209,428,725,808.11
  5. Step 5: Solve for x
    x = 209,428,725,808.11/528,739.20
  6. Step 6: Final answer
    x = 396,090.79

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