Finding the Fourth Proportional to 12,080.06, 18,124.20 and 10,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,080.06 : 18,124.20 = 10,915.50 : x
2. Step 2: Convert to fraction form
   12,080.06/18,124.20 = 10,915.50/x
3. Step 3: Cross multiply
   12,080.06x = 18,124.20 × 10,915.50
4. Step 4: Simplify right side
   12,080.06x = 197,834,705.10
5. Step 5: Solve for x
   x = 197,834,705.10/12,080.06
6. Step 6: Final answer
   x = 16,376.96