Finding the Fourth Proportional to 22,756.32, 31,403.22 and 12,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,756.32 : 31,403.22 = 12,684.72 : x
2. Step 2: Convert to fraction form
   22,756.32/31,403.22 = 12,684.72/x
3. Step 3: Cross multiply
   22,756.32x = 31,403.22 × 12,684.72
4. Step 4: Simplify right side
   22,756.32x = 398,341,052.80
5. Step 5: Solve for x
   x = 398,341,052.80/22,756.32
6. Step 6: Final answer
   x = 17,504.63