Finding the Fourth Proportional to 2,501.16, 3,752.55 and 857.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,501.16 : 3,752.55 = 857.67 : x
2. Step 2: Convert to fraction form
   2,501.16/3,752.55 = 857.67/x
3. Step 3: Cross multiply
   2,501.16x = 3,752.55 × 857.67
4. Step 4: Simplify right side
   2,501.16x = 3,218,449.56
5. Step 5: Solve for x
   x = 3,218,449.56/2,501.16
6. Step 6: Final answer
   x = 1,286.78