Finding the Fourth Proportional to 14,091.72, 21,104.02 and 8,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   14,091.72 : 21,104.02 = 8,156.10 : x
2. Step 2: Convert to fraction form
   14,091.72/21,104.02 = 8,156.10/x
3. Step 3: Cross multiply
   14,091.72x = 21,104.02 × 8,156.10
4. Step 4: Simplify right side
   14,091.72x = 172,126,550.28
5. Step 5: Solve for x
   x = 172,126,550.28/14,091.72
6. Step 6: Final answer
   x = 12,214.73