Finding the Fourth Proportional to 2,715.72, 4,065.48 and 2,669.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.72 : 4,065.48 = 2,669.28 : x
2. Step 2: Convert to fraction form
   2,715.72/4,065.48 = 2,669.28/x
3. Step 3: Cross multiply
   2,715.72x = 4,065.48 × 2,669.28
4. Step 4: Simplify right side
   2,715.72x = 10,851,904.45
5. Step 5: Solve for x
   x = 10,851,904.45/2,715.72
6. Step 6: Final answer
   x = 3,995.96