Finding the Fourth Proportional to 7,665.72, 11,499.78 and 2,472.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,665.72 : 11,499.78 = 2,472.12 : x
2. Step 2: Convert to fraction form
   7,665.72/11,499.78 = 2,472.12/x
3. Step 3: Cross multiply
   7,665.72x = 11,499.78 × 2,472.12
4. Step 4: Simplify right side
   7,665.72x = 28,428,836.13
5. Step 5: Solve for x
   x = 28,428,836.13/7,665.72
6. Step 6: Final answer
   x = 3,708.57