Finding the Fourth Proportional to 22,674, 31,290.12 and 12,738

Step by Step Solution

1. Step 1: Write the proportion equation
   22,674 : 31,290.12 = 12,738 : x
2. Step 2: Convert to fraction form
   22,674/31,290.12 = 12,738/x
3. Step 3: Cross multiply
   22,674x = 31,290.12 × 12,738
4. Step 4: Simplify right side
   22,674x = 398,573,548.56
5. Step 5: Solve for x
   x = 398,573,548.56/22,674
6. Step 6: Final answer
   x = 17,578.44