Finding the Fourth Proportional to 72,799.72, 109,190.94 and 42,831.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,799.72 : 109,190.94 = 42,831.88 : x
2. Step 2: Convert to fraction form
   72,799.72/109,190.94 = 42,831.88/x
3. Step 3: Cross multiply
   72,799.72x = 109,190.94 × 42,831.88
4. Step 4: Simplify right side
   72,799.72x = 4,676,853,239.17
5. Step 5: Solve for x
   x = 4,676,853,239.17/72,799.72
6. Step 6: Final answer
   x = 64,242.74