Finding the Fourth Proportional to 11,679.50, 16,117.72 and 6,711.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,679.50 : 16,117.72 = 6,711.50 : x
2. Step 2: Convert to fraction form
   11,679.50/16,117.72 = 6,711.50/x
3. Step 3: Cross multiply
   11,679.50x = 16,117.72 × 6,711.50
4. Step 4: Simplify right side
   11,679.50x = 108,174,077.78
5. Step 5: Solve for x
   x = 108,174,077.78/11,679.50
6. Step 6: Final answer
   x = 9,261.88