Finding the Fourth Proportional to 3,800.72, 5,247.96 and 2,915.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,800.72 : 5,247.96 = 2,915.12 : x
2. Step 2: Convert to fraction form
   3,800.72/5,247.96 = 2,915.12/x
3. Step 3: Cross multiply
   3,800.72x = 5,247.96 × 2,915.12
4. Step 4: Simplify right side
   3,800.72x = 15,298,433.16
5. Step 5: Solve for x
   x = 15,298,433.16/3,800.72
6. Step 6: Final answer
   x = 4,025.14