Finding the Fourth Proportional to 21,102.83, 29,124.66 and 12,150.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,102.83 : 29,124.66 = 12,150.71 : x
2. Step 2: Convert to fraction form
   21,102.83/29,124.66 = 12,150.71/x
3. Step 3: Cross multiply
   21,102.83x = 29,124.66 × 12,150.71
4. Step 4: Simplify right side
   21,102.83x = 353,885,151.89
5. Step 5: Solve for x
   x = 353,885,151.89/21,102.83
6. Step 6: Final answer
   x = 16,769.56