Finding the Fourth Proportional to 22,747.88, 31,393.90 and 12,679.58

Step by Step Solution

1. Step 1: Write the proportion equation
   22,747.88 : 31,393.90 = 12,679.58 : x
2. Step 2: Convert to fraction form
   22,747.88/31,393.90 = 12,679.58/x
3. Step 3: Cross multiply
   22,747.88x = 31,393.90 × 12,679.58
4. Step 4: Simplify right side
   22,747.88x = 398,061,466.56
5. Step 5: Solve for x
   x = 398,061,466.56/22,747.88
6. Step 6: Final answer
   x = 17,498.84