Finding the Fourth Proportional to 21,684.59, 29,924.72 and 12,253.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,684.59 : 29,924.72 = 12,253.15 : x
2. Step 2: Convert to fraction form
   21,684.59/29,924.72 = 12,253.15/x
3. Step 3: Cross multiply
   21,684.59x = 29,924.72 × 12,253.15
4. Step 4: Simplify right side
   21,684.59x = 366,672,082.87
5. Step 5: Solve for x
   x = 366,672,082.87/21,684.59
6. Step 6: Final answer
   x = 16,909.34