Finding the Fourth Proportional to 10,680.58, 14,746.13 and 9,559.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,680.58 : 14,746.13 = 9,559.57 : x
2. Step 2: Convert to fraction form
   10,680.58/14,746.13 = 9,559.57/x
3. Step 3: Cross multiply
   10,680.58x = 14,746.13 × 9,559.57
4. Step 4: Simplify right side
   10,680.58x = 140,966,661.96
5. Step 5: Solve for x
   x = 140,966,661.96/10,680.58
6. Step 6: Final answer
   x = 13,198.41