Finding the Fourth Proportional to 9,916.54, 14,845.59 and 8,686.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,916.54 : 14,845.59 = 8,686.36 : x
2. Step 2: Convert to fraction form
   9,916.54/14,845.59 = 8,686.36/x
3. Step 3: Cross multiply
   9,916.54x = 14,845.59 × 8,686.36
4. Step 4: Simplify right side
   9,916.54x = 128,954,139.15
5. Step 5: Solve for x
   x = 128,954,139.15/9,916.54
6. Step 6: Final answer
   x = 13,003.94