Finding the Fourth Proportional to 22,705.28, 31,334.72 and 12,769.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,705.28 : 31,334.72 = 12,769.92 : x
2. Step 2: Convert to fraction form
   22,705.28/31,334.72 = 12,769.92/x
3. Step 3: Cross multiply
   22,705.28x = 31,334.72 × 12,769.92
4. Step 4: Simplify right side
   22,705.28x = 400,141,867.62
5. Step 5: Solve for x
   x = 400,141,867.62/22,705.28
6. Step 6: Final answer
   x = 17,623.30