Finding the Fourth Proportional to 22,809.50, 31,476.80 and 12,738.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,809.50 : 31,476.80 = 12,738.12 : x
2. Step 2: Convert to fraction form
   22,809.50/31,476.80 = 12,738.12/x
3. Step 3: Cross multiply
   22,809.50x = 31,476.80 × 12,738.12
4. Step 4: Simplify right side
   22,809.50x = 400,955,191.93
5. Step 5: Solve for x
   x = 400,955,191.93/22,809.50
6. Step 6: Final answer
   x = 17,578.43