Finding the Fourth Proportional to 12,116.10, 18,150.15 and 10,672.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,116.10 : 18,150.15 = 10,672.90 : x
2. Step 2: Convert to fraction form
   12,116.10/18,150.15 = 10,672.90/x
3. Step 3: Cross multiply
   12,116.10x = 18,150.15 × 10,672.90
4. Step 4: Simplify right side
   12,116.10x = 193,714,735.94
5. Step 5: Solve for x
   x = 193,714,735.94/12,116.10
6. Step 6: Final answer
   x = 15,988.21