Finding the Fourth Proportional to 22,273.40, 30,728.72 and 12,713.83

Step by Step Solution

1. Step 1: Write the proportion equation
   22,273.40 : 30,728.72 = 12,713.83 : x
2. Step 2: Convert to fraction form
   22,273.40/30,728.72 = 12,713.83/x
3. Step 3: Cross multiply
   22,273.40x = 30,728.72 × 12,713.83
4. Step 4: Simplify right side
   22,273.40x = 390,679,677.16
5. Step 5: Solve for x
   x = 390,679,677.16/22,273.40
6. Step 6: Final answer
   x = 17,540.19