Finding the Fourth Proportional to 72,960.54, 109,431 and 20,375.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,960.54 : 109,431 = 20,375.34 : x
2. Step 2: Convert to fraction form
   72,960.54/109,431 = 20,375.34/x
3. Step 3: Cross multiply
   72,960.54x = 109,431 × 20,375.34
4. Step 4: Simplify right side
   72,960.54x = 2,229,693,831.54
5. Step 5: Solve for x
   x = 2,229,693,831.54/72,960.54
6. Step 6: Final answer
   x = 30,560.27