Finding the Fourth Proportional to 2,502.72, 3,753.12 and 858.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.72 : 3,753.12 = 858.96 : x
2. Step 2: Convert to fraction form
   2,502.72/3,753.12 = 858.96/x
3. Step 3: Cross multiply
   2,502.72x = 3,753.12 × 858.96
4. Step 4: Simplify right side
   2,502.72x = 3,223,779.96
5. Step 5: Solve for x
   x = 3,223,779.96/2,502.72
6. Step 6: Final answer
   x = 1,288.11