Finding the Fourth Proportional to 22,809.59, 31,476.93 and 12,738.21

Step by Step Solution

1. Step 1: Write the proportion equation
   22,809.59 : 31,476.93 = 12,738.21 : x
2. Step 2: Convert to fraction form
   22,809.59/31,476.93 = 12,738.21/x
3. Step 3: Cross multiply
   22,809.59x = 31,476.93 × 12,738.21
4. Step 4: Simplify right side
   22,809.59x = 400,959,744.50
5. Step 5: Solve for x
   x = 400,959,744.50/22,809.59
6. Step 6: Final answer
   x = 17,578.56