Finding the Fourth Proportional to 52,831.20, 72,906.72 and 28,959.36

Step by Step Solution

1. Step 1: Write the proportion equation
   52,831.20 : 72,906.72 = 28,959.36 : x
2. Step 2: Convert to fraction form
   52,831.20/72,906.72 = 28,959.36/x
3. Step 3: Cross multiply
   52,831.20x = 72,906.72 × 28,959.36
4. Step 4: Simplify right side
   52,831.20x = 2,111,331,950.90
5. Step 5: Solve for x
   x = 2,111,331,950.90/52,831.20
6. Step 6: Final answer
   x = 39,963.73