Finding the Fourth Proportional to 11,308.72, 16,965.96 and 3,517.60

Step by Step Solution

1. Step 1: Write the proportion equation
   11,308.72 : 16,965.96 = 3,517.60 : x
2. Step 2: Convert to fraction form
   11,308.72/16,965.96 = 3,517.60/x
3. Step 3: Cross multiply
   11,308.72x = 16,965.96 × 3,517.60
4. Step 4: Simplify right side
   11,308.72x = 59,679,460.90
5. Step 5: Solve for x
   x = 59,679,460.90/11,308.72
6. Step 6: Final answer
   x = 5,277.30