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Finding the Fourth Proportional to 8,406.11, 12,600.36 and 3,138.86

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Solution

The fourth proportional to 8,406.11, 12,600.36 and 3,138.86 is: 4,705.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,406.11 : 12,600.36 = 3,138.86 : x
  2. Step 2: Convert to fraction form
    8,406.11/12,600.36 = 3,138.86/x
  3. Step 3: Cross multiply
    8,406.11x = 12,600.36 × 3,138.86
  4. Step 4: Simplify right side
    8,406.11x = 39,550,702.99
  5. Step 5: Solve for x
    x = 39,550,702.99/8,406.11
  6. Step 6: Final answer
    x = 4,705.00

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