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Finding the Fourth Proportional to 1,875.84, 2,811.87 and 1,391.06

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Solution

The fourth proportional to 1,875.84, 2,811.87 and 1,391.06 is: 2,085.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.84 : 2,811.87 = 1,391.06 : x
  2. Step 2: Convert to fraction form
    1,875.84/2,811.87 = 1,391.06/x
  3. Step 3: Cross multiply
    1,875.84x = 2,811.87 × 1,391.06
  4. Step 4: Simplify right side
    1,875.84x = 3,911,465.82
  5. Step 5: Solve for x
    x = 3,911,465.82/1,875.84
  6. Step 6: Final answer
    x = 2,085.18

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