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Finding the Fourth Proportional to 39,639.94, 54,702.73 and 21,734.91

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Solution

The fourth proportional to 39,639.94, 54,702.73 and 21,734.91 is: 29,993.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,639.94 : 54,702.73 = 21,734.91 : x
  2. Step 2: Convert to fraction form
    39,639.94/54,702.73 = 21,734.91/x
  3. Step 3: Cross multiply
    39,639.94x = 54,702.73 × 21,734.91
  4. Step 4: Simplify right side
    39,639.94x = 1,188,958,818.21
  5. Step 5: Solve for x
    x = 1,188,958,818.21/39,639.94
  6. Step 6: Final answer
    x = 29,993.96

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