Finding the Fourth Proportional to 21,938.32, 32,854.72 and 12,549.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,938.32 : 32,854.72 = 12,549.88 : x
2. Step 2: Convert to fraction form
   21,938.32/32,854.72 = 12,549.88/x
3. Step 3: Cross multiply
   21,938.32x = 32,854.72 × 12,549.88
4. Step 4: Simplify right side
   21,938.32x = 412,322,793.43
5. Step 5: Solve for x
   x = 412,322,793.43/21,938.32
6. Step 6: Final answer
   x = 18,794.64