Finding the Fourth Proportional to 14,105.98, 21,173.55 and 8,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,105.98 : 21,173.55 = 8,915.50 : x
2. Step 2: Convert to fraction form
   14,105.98/21,173.55 = 8,915.50/x
3. Step 3: Cross multiply
   14,105.98x = 21,173.55 × 8,915.50
4. Step 4: Simplify right side
   14,105.98x = 188,772,785.03
5. Step 5: Solve for x
   x = 188,772,785.03/14,105.98
6. Step 6: Final answer
   x = 13,382.47