Finding the Fourth Proportional to 3,840.72, 5,298.76 and 2,515.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,840.72 : 5,298.76 = 2,515.16 : x
2. Step 2: Convert to fraction form
   3,840.72/5,298.76 = 2,515.16/x
3. Step 3: Cross multiply
   3,840.72x = 5,298.76 × 2,515.16
4. Step 4: Simplify right side
   3,840.72x = 13,327,229.20
5. Step 5: Solve for x
   x = 13,327,229.20/3,840.72
6. Step 6: Final answer
   x = 3,469.98