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Finding the Fourth Proportional to 12,906.86, 19,358.46 and 4,140.62

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Solution

The fourth proportional to 12,906.86, 19,358.46 and 4,140.62 is: 6,210.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,906.86 : 19,358.46 = 4,140.62 : x
  2. Step 2: Convert to fraction form
    12,906.86/19,358.46 = 4,140.62/x
  3. Step 3: Cross multiply
    12,906.86x = 19,358.46 × 4,140.62
  4. Step 4: Simplify right side
    12,906.86x = 80,156,026.65
  5. Step 5: Solve for x
    x = 80,156,026.65/12,906.86
  6. Step 6: Final answer
    x = 6,210.34

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