Finding the Fourth Proportional to 11,311.79, 15,605.98 and 8,334.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,311.79 : 15,605.98 = 8,334.72 : x
2. Step 2: Convert to fraction form
   11,311.79/15,605.98 = 8,334.72/x
3. Step 3: Cross multiply
   11,311.79x = 15,605.98 × 8,334.72
4. Step 4: Simplify right side
   11,311.79x = 130,071,452.79
5. Step 5: Solve for x
   x = 130,071,452.79/11,311.79
6. Step 6: Final answer
   x = 11,498.76