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Finding the Fourth Proportional to 620,978.08, 931,828.62 and 261,122.92

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Solution

The fourth proportional to 620,978.08, 931,828.62 and 261,122.92 is: 391,836.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,978.08 : 931,828.62 = 261,122.92 : x
  2. Step 2: Convert to fraction form
    620,978.08/931,828.62 = 261,122.92/x
  3. Step 3: Cross multiply
    620,978.08x = 931,828.62 × 261,122.92
  4. Step 4: Simplify right side
    620,978.08x = 243,321,810,193.97
  5. Step 5: Solve for x
    x = 243,321,810,193.97/620,978.08
  6. Step 6: Final answer
    x = 391,836.39

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