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Finding the Fourth Proportional to 1,812.15, 2,718.23 and 1,120.82

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Solution

The fourth proportional to 1,812.15, 2,718.23 and 1,120.82 is: 1,681.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.15 : 2,718.23 = 1,120.82 : x
  2. Step 2: Convert to fraction form
    1,812.15/2,718.23 = 1,120.82/x
  3. Step 3: Cross multiply
    1,812.15x = 2,718.23 × 1,120.82
  4. Step 4: Simplify right side
    1,812.15x = 3,046,627.35
  5. Step 5: Solve for x
    x = 3,046,627.35/1,812.15
  6. Step 6: Final answer
    x = 1,681.22

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