Finding the Fourth Proportional to 2,501.85, 3,753.20 and 858.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,501.85 : 3,753.20 = 858.00 : x
2. Step 2: Convert to fraction form
   2,501.85/3,753.20 = 858.00/x
3. Step 3: Cross multiply
   2,501.85x = 3,753.20 × 858.00
4. Step 4: Simplify right side
   2,501.85x = 3,220,261.82
5. Step 5: Solve for x
   x = 3,220,261.82/2,501.85
6. Step 6: Final answer
   x = 1,287.15