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Finding the Fourth Proportional to 8,719.65, 13,079.37 and 2,145.90

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Solution

The fourth proportional to 8,719.65, 13,079.37 and 2,145.90 is: 3,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.65 : 13,079.37 = 2,145.90 : x
  2. Step 2: Convert to fraction form
    8,719.65/13,079.37 = 2,145.90/x
  3. Step 3: Cross multiply
    8,719.65x = 13,079.37 × 2,145.90
  4. Step 4: Simplify right side
    8,719.65x = 28,067,020.08
  5. Step 5: Solve for x
    x = 28,067,020.08/8,719.65
  6. Step 6: Final answer
    x = 3,218.82

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