Finding the Fourth Proportional to 89,377.94, 123,295.91 and 57,078.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,377.94 : 123,295.91 = 57,078.60 : x
2. Step 2: Convert to fraction form
   89,377.94/123,295.91 = 57,078.60/x
3. Step 3: Cross multiply
   89,377.94x = 123,295.91 × 57,078.60
4. Step 4: Simplify right side
   89,377.94x = 7,037,557,643.13
5. Step 5: Solve for x
   x = 7,037,557,643.13/89,377.94
6. Step 6: Final answer
   x = 78,739.32