Finding the Fourth Proportional to 22,680.82, 31,289.43 and 13,245.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,680.82 : 31,289.43 = 13,245.22 : x
2. Step 2: Convert to fraction form
   22,680.82/31,289.43 = 13,245.22/x
3. Step 3: Cross multiply
   22,680.82x = 31,289.43 × 13,245.22
4. Step 4: Simplify right side
   22,680.82x = 414,435,384.02
5. Step 5: Solve for x
   x = 414,435,384.02/22,680.82
6. Step 6: Final answer
   x = 18,272.50