Finding the Fourth Proportional to 2,502.30, 3,753.90 and 858.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,502.30 : 3,753.90 = 858.42 : x
2. Step 2: Convert to fraction form
   2,502.30/3,753.90 = 858.42/x
3. Step 3: Cross multiply
   2,502.30x = 3,753.90 × 858.42
4. Step 4: Simplify right side
   2,502.30x = 3,222,422.84
5. Step 5: Solve for x
   x = 3,222,422.84/2,502.30
6. Step 6: Final answer
   x = 1,287.78