Finding the Fourth Proportional to 11,836.28, 17,748.20 and 3,515.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,836.28 : 17,748.20 = 3,515.15 : x
2. Step 2: Convert to fraction form
   11,836.28/17,748.20 = 3,515.15/x
3. Step 3: Cross multiply
   11,836.28x = 17,748.20 × 3,515.15
4. Step 4: Simplify right side
   11,836.28x = 62,387,638.39
5. Step 5: Solve for x
   x = 62,387,638.39/11,836.28
6. Step 6: Final answer
   x = 5,270.88