Finding the Fourth Proportional to 16,629.56, 22,951.72 and 9,915.60

Step by Step Solution

1. Step 1: Write the proportion equation
   16,629.56 : 22,951.72 = 9,915.60 : x
2. Step 2: Convert to fraction form
   16,629.56/22,951.72 = 9,915.60/x
3. Step 3: Cross multiply
   16,629.56x = 22,951.72 × 9,915.60
4. Step 4: Simplify right side
   16,629.56x = 227,580,074.83
5. Step 5: Solve for x
   x = 227,580,074.83/16,629.56
6. Step 6: Final answer
   x = 13,685.27