Finding the Fourth Proportional to 81,571.86, 112,568.88 and 45,278.78

Step by Step Solution

1. Step 1: Write the proportion equation
   81,571.86 : 112,568.88 = 45,278.78 : x
2. Step 2: Convert to fraction form
   81,571.86/112,568.88 = 45,278.78/x
3. Step 3: Cross multiply
   81,571.86x = 112,568.88 × 45,278.78
4. Step 4: Simplify right side
   81,571.86x = 5,096,981,552.37
5. Step 5: Solve for x
   x = 5,096,981,552.37/81,571.86
6. Step 6: Final answer
   x = 62,484.56