Finding the Fourth Proportional to 3,807.24, 5,706.14 and 2,158.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807.24 : 5,706.14 = 2,158.78 : x
2. Step 2: Convert to fraction form
   3,807.24/5,706.14 = 2,158.78/x
3. Step 3: Cross multiply
   3,807.24x = 5,706.14 × 2,158.78
4. Step 4: Simplify right side
   3,807.24x = 12,318,300.91
5. Step 5: Solve for x
   x = 12,318,300.91/3,807.24
6. Step 6: Final answer
   x = 3,235.49