Finding the Fourth Proportional to 10,552.64, 14,629.23 and 9,990.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,552.64 : 14,629.23 = 9,990.86 : x
2. Step 2: Convert to fraction form
   10,552.64/14,629.23 = 9,990.86/x
3. Step 3: Cross multiply
   10,552.64x = 14,629.23 × 9,990.86
4. Step 4: Simplify right side
   10,552.64x = 146,158,515.69
5. Step 5: Solve for x
   x = 146,158,515.69/10,552.64
6. Step 6: Final answer
   x = 13,850.43