Finding the Fourth Proportional to 78,454.79, 108,268.34 and 42,644.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,454.79 : 108,268.34 = 42,644.89 : x
2. Step 2: Convert to fraction form
   78,454.79/108,268.34 = 42,644.89/x
3. Step 3: Cross multiply
   78,454.79x = 108,268.34 × 42,644.89
4. Step 4: Simplify right side
   78,454.79x = 4,617,091,449.78
5. Step 5: Solve for x
   x = 4,617,091,449.78/78,454.79
6. Step 6: Final answer
   x = 58,850.34