Finding the Fourth Proportional to 89,362.42, 123,320.25 and 49,078.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,362.42 : 123,320.25 = 49,078.78 : x
2. Step 2: Convert to fraction form
   89,362.42/123,320.25 = 49,078.78/x
3. Step 3: Cross multiply
   89,362.42x = 123,320.25 × 49,078.78
4. Step 4: Simplify right side
   89,362.42x = 6,052,407,419.30
5. Step 5: Solve for x
   x = 6,052,407,419.30/89,362.42
6. Step 6: Final answer
   x = 67,728.78