Finding the Fourth Proportional to 2,502.12, 3,753.72 and 858.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.12 : 3,753.72 = 858.71 : x
2. Step 2: Convert to fraction form
   2,502.12/3,753.72 = 858.71/x
3. Step 3: Cross multiply
   2,502.12x = 3,753.72 × 858.71
4. Step 4: Simplify right side
   2,502.12x = 3,223,356.90
5. Step 5: Solve for x
   x = 3,223,356.90/2,502.12
6. Step 6: Final answer
   x = 1,288.25