Finding the Fourth Proportional to 11,013.87, 16,515.42 and 7,683.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,013.87 : 16,515.42 = 7,683.72 : x
2. Step 2: Convert to fraction form
   11,013.87/16,515.42 = 7,683.72/x
3. Step 3: Cross multiply
   11,013.87x = 16,515.42 × 7,683.72
4. Step 4: Simplify right side
   11,013.87x = 126,899,862.96
5. Step 5: Solve for x
   x = 126,899,862.96/11,013.87
6. Step 6: Final answer
   x = 11,521.82