Finding the Fourth Proportional to 5,258.16, 7,256.16 and 2,868.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,258.16 : 7,256.16 = 2,868.15 : x
2. Step 2: Convert to fraction form
   5,258.16/7,256.16 = 2,868.15/x
3. Step 3: Cross multiply
   5,258.16x = 7,256.16 × 2,868.15
4. Step 4: Simplify right side
   5,258.16x = 20,811,755.30
5. Step 5: Solve for x
   x = 20,811,755.30/5,258.16
6. Step 6: Final answer
   x = 3,957.99