Finding the Fourth Proportional to 22,546.02, 31,116.78 and 13,119.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,546.02 : 31,116.78 = 13,119.78 : x
2. Step 2: Convert to fraction form
   22,546.02/31,116.78 = 13,119.78/x
3. Step 3: Cross multiply
   22,546.02x = 31,116.78 × 13,119.78
4. Step 4: Simplify right side
   22,546.02x = 408,245,307.91
5. Step 5: Solve for x
   x = 408,245,307.91/22,546.02
6. Step 6: Final answer
   x = 18,107.20