Finding the Fourth Proportional to 78,275.28, 108,018.72 and 42,465.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,275.28 : 108,018.72 = 42,465.36 : x
2. Step 2: Convert to fraction form
   78,275.28/108,018.72 = 42,465.36/x
3. Step 3: Cross multiply
   78,275.28x = 108,018.72 × 42,465.36
4. Step 4: Simplify right side
   78,275.28x = 4,587,053,831.54
5. Step 5: Solve for x
   x = 4,587,053,831.54/78,275.28
6. Step 6: Final answer
   x = 58,601.56