Finding the Fourth Proportional to 83,978.94, 115,906.02 and 48,180.78

Step by Step Solution

1. Step 1: Write the proportion equation
   83,978.94 : 115,906.02 = 48,180.78 : x
2. Step 2: Convert to fraction form
   83,978.94/115,906.02 = 48,180.78/x
3. Step 3: Cross multiply
   83,978.94x = 115,906.02 × 48,180.78
4. Step 4: Simplify right side
   83,978.94x = 5,584,442,450.30
5. Step 5: Solve for x
   x = 5,584,442,450.30/83,978.94
6. Step 6: Final answer
   x = 66,498.13