Finding the Fourth Proportional to 1,631.12, 2,251.24 and 932.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.12 : 2,251.24 = 932.72 : x
2. Step 2: Convert to fraction form
   1,631.12/2,251.24 = 932.72/x
3. Step 3: Cross multiply
   1,631.12x = 2,251.24 × 932.72
4. Step 4: Simplify right side
   1,631.12x = 2,099,776.57
5. Step 5: Solve for x
   x = 2,099,776.57/1,631.12
6. Step 6: Final answer
   x = 1,287.32