Finding the Fourth Proportional to 21,522.53, 29,703.88 and 12,091.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,522.53 : 29,703.88 = 12,091.09 : x
2. Step 2: Convert to fraction form
   21,522.53/29,703.88 = 12,091.09/x
3. Step 3: Cross multiply
   21,522.53x = 29,703.88 × 12,091.09
4. Step 4: Simplify right side
   21,522.53x = 359,152,286.43
5. Step 5: Solve for x
   x = 359,152,286.43/21,522.53
6. Step 6: Final answer
   x = 16,687.27