Finding the Fourth Proportional to 10,963.88, 15,120.23 and 7,185.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,963.88 : 15,120.23 = 7,185.69 : x
2. Step 2: Convert to fraction form
   10,963.88/15,120.23 = 7,185.69/x
3. Step 3: Cross multiply
   10,963.88x = 15,120.23 × 7,185.69
4. Step 4: Simplify right side
   10,963.88x = 108,649,285.51
5. Step 5: Solve for x
   x = 108,649,285.51/10,963.88
6. Step 6: Final answer
   x = 9,909.75