Finding the Fourth Proportional to 21,650.91, 29,867.25 and 13,150.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,650.91 : 29,867.25 = 13,150.77 : x
2. Step 2: Convert to fraction form
   21,650.91/29,867.25 = 13,150.77/x
3. Step 3: Cross multiply
   21,650.91x = 29,867.25 × 13,150.77
4. Step 4: Simplify right side
   21,650.91x = 392,777,194.86
5. Step 5: Solve for x
   x = 392,777,194.86/21,650.91
6. Step 6: Final answer
   x = 18,141.37