Finding the Fourth Proportional to 22,809.12, 31,473.81 and 12,738.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,809.12 : 31,473.81 = 12,738.12 : x
2. Step 2: Convert to fraction form
   22,809.12/31,473.81 = 12,738.12/x
3. Step 3: Cross multiply
   22,809.12x = 31,473.81 × 12,738.12
4. Step 4: Simplify right side
   22,809.12x = 400,917,168.64
5. Step 5: Solve for x
   x = 400,917,168.64/22,809.12
6. Step 6: Final answer
   x = 17,577.06