Finding the Fourth Proportional to 21,540.52, 29,723.52 and 12,108.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,540.52 : 29,723.52 = 12,108.88 : x
2. Step 2: Convert to fraction form
   21,540.52/29,723.52 = 12,108.88/x
3. Step 3: Cross multiply
   21,540.52x = 29,723.52 × 12,108.88
4. Step 4: Simplify right side
   21,540.52x = 359,918,536.86
5. Step 5: Solve for x
   x = 359,918,536.86/21,540.52
6. Step 6: Final answer
   x = 16,708.91