Finding the Fourth Proportional to 2,502.16, 3,752.52 and 858.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.16 : 3,752.52 = 858.70 : x
2. Step 2: Convert to fraction form
   2,502.16/3,752.52 = 858.70/x
3. Step 3: Cross multiply
   2,502.16x = 3,752.52 × 858.70
4. Step 4: Simplify right side
   2,502.16x = 3,222,288.92
5. Step 5: Solve for x
   x = 3,222,288.92/2,502.16
6. Step 6: Final answer
   x = 1,287.80