Finding the Fourth Proportional to 2,646.72, 3,656.16 and 2,517.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,646.72 : 3,656.16 = 2,517.12 : x
2. Step 2: Convert to fraction form
   2,646.72/3,656.16 = 2,517.12/x
3. Step 3: Cross multiply
   2,646.72x = 3,656.16 × 2,517.12
4. Step 4: Simplify right side
   2,646.72x = 9,202,993.46
5. Step 5: Solve for x
   x = 9,202,993.46/2,646.72
6. Step 6: Final answer
   x = 3,477.13