Finding the Fourth Proportional to 21,524.69, 29,700.78 and 12,091.43

Step by Step Solution

1. Step 1: Write the proportion equation
   21,524.69 : 29,700.78 = 12,091.43 : x
2. Step 2: Convert to fraction form
   21,524.69/29,700.78 = 12,091.43/x
3. Step 3: Cross multiply
   21,524.69x = 29,700.78 × 12,091.43
4. Step 4: Simplify right side
   21,524.69x = 359,124,902.32
5. Step 5: Solve for x
   x = 359,124,902.32/21,524.69
6. Step 6: Final answer
   x = 16,684.32