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Finding the Fourth Proportional to 1,881, 2,819.61 and 785.97

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Solution

The fourth proportional to 1,881, 2,819.61 and 785.97 is: 1,178.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881 : 2,819.61 = 785.97 : x
  2. Step 2: Convert to fraction form
    1,881/2,819.61 = 785.97/x
  3. Step 3: Cross multiply
    1,881x = 2,819.61 × 785.97
  4. Step 4: Simplify right side
    1,881x = 2,216,128.87
  5. Step 5: Solve for x
    x = 2,216,128.87/1,881
  6. Step 6: Final answer
    x = 1,178.17

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