Finding the Fourth Proportional to 22,756.46, 31,404.87 and 12,684.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,756.46 : 31,404.87 = 12,684.89 : x
2. Step 2: Convert to fraction form
   22,756.46/31,404.87 = 12,684.89/x
3. Step 3: Cross multiply
   22,756.46x = 31,404.87 × 12,684.89
4. Step 4: Simplify right side
   22,756.46x = 398,367,164.39
5. Step 5: Solve for x
   x = 398,367,164.39/22,756.46
6. Step 6: Final answer
   x = 17,505.68