Finding the Fourth Proportional to 2,502.47, 3,754.31 and 858.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.47 : 3,754.31 = 858.58 : x
2. Step 2: Convert to fraction form
   2,502.47/3,754.31 = 858.58/x
3. Step 3: Cross multiply
   2,502.47x = 3,754.31 × 858.58
4. Step 4: Simplify right side
   2,502.47x = 3,223,375.48
5. Step 5: Solve for x
   x = 3,223,375.48/2,502.47
6. Step 6: Final answer
   x = 1,288.08