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Finding the Fourth Proportional to 2,621.76, 3,930.81 and 1,160.11

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Solution

The fourth proportional to 2,621.76, 3,930.81 and 1,160.11 is: 1,739.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.76 : 3,930.81 = 1,160.11 : x
  2. Step 2: Convert to fraction form
    2,621.76/3,930.81 = 1,160.11/x
  3. Step 3: Cross multiply
    2,621.76x = 3,930.81 × 1,160.11
  4. Step 4: Simplify right side
    2,621.76x = 4,560,171.99
  5. Step 5: Solve for x
    x = 4,560,171.99/2,621.76
  6. Step 6: Final answer
    x = 1,739.36

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