Finding the Fourth Proportional to 22,756.32, 31,385.52 and 15,681.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,756.32 : 31,385.52 = 15,681.12 : x
2. Step 2: Convert to fraction form
   22,756.32/31,385.52 = 15,681.12/x
3. Step 3: Cross multiply
   22,756.32x = 31,385.52 × 15,681.12
4. Step 4: Simplify right side
   22,756.32x = 492,160,105.38
5. Step 5: Solve for x
   x = 492,160,105.38/22,756.32
6. Step 6: Final answer
   x = 21,627.40