Finding the Fourth Proportional to 11,321.03, 15,613.43 and 7,288.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,321.03 : 15,613.43 = 7,288.55 : x
2. Step 2: Convert to fraction form
   11,321.03/15,613.43 = 7,288.55/x
3. Step 3: Cross multiply
   11,321.03x = 15,613.43 × 7,288.55
4. Step 4: Simplify right side
   11,321.03x = 113,799,150.72
5. Step 5: Solve for x
   x = 113,799,150.72/11,321.03
6. Step 6: Final answer
   x = 10,052.02