Finding the Fourth Proportional to 11,513.30, 17,265.61 and 3,720.02

Step by Step Solution

1. Step 1: Write the proportion equation
   11,513.30 : 17,265.61 = 3,720.02 : x
2. Step 2: Convert to fraction form
   11,513.30/17,265.61 = 3,720.02/x
3. Step 3: Cross multiply
   11,513.30x = 17,265.61 × 3,720.02
4. Step 4: Simplify right side
   11,513.30x = 64,228,414.51
5. Step 5: Solve for x
   x = 64,228,414.51/11,513.30
6. Step 6: Final answer
   x = 5,578.63