Finding the Fourth Proportional to 22,680.57, 31,290.87 and 13,724.82

Step by Step Solution

1. Step 1: Write the proportion equation
   22,680.57 : 31,290.87 = 13,724.82 : x
2. Step 2: Convert to fraction form
   22,680.57/31,290.87 = 13,724.82/x
3. Step 3: Cross multiply
   22,680.57x = 31,290.87 × 13,724.82
4. Step 4: Simplify right side
   22,680.57x = 429,461,558.39
5. Step 5: Solve for x
   x = 429,461,558.39/22,680.57
6. Step 6: Final answer
   x = 18,935.22