Finding the Fourth Proportional to 2,502.35, 3,753.56 and 858.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.35 : 3,753.56 = 858.86 : x
2. Step 2: Convert to fraction form
   2,502.35/3,753.56 = 858.86/x
3. Step 3: Cross multiply
   2,502.35x = 3,753.56 × 858.86
4. Step 4: Simplify right side
   2,502.35x = 3,223,782.54
5. Step 5: Solve for x
   x = 3,223,782.54/2,502.35
6. Step 6: Final answer
   x = 1,288.30