Finding the Fourth Proportional to 11,158.89, 15,398.55 and 6,443.07

Step by Step Solution

1. Step 1: Write the proportion equation
   11,158.89 : 15,398.55 = 6,443.07 : x
2. Step 2: Convert to fraction form
   11,158.89/15,398.55 = 6,443.07/x
3. Step 3: Cross multiply
   11,158.89x = 15,398.55 × 6,443.07
4. Step 4: Simplify right side
   11,158.89x = 99,213,935.55
5. Step 5: Solve for x
   x = 99,213,935.55/11,158.89
6. Step 6: Final answer
   x = 8,891.02