Finding the Fourth Proportional to 78,456.59, 108,268.81 and 42,647.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.59 : 108,268.81 = 42,647.50 : x
2. Step 2: Convert to fraction form
   78,456.59/108,268.81 = 42,647.50/x
3. Step 3: Cross multiply
   78,456.59x = 108,268.81 × 42,647.50
4. Step 4: Simplify right side
   78,456.59x = 4,617,394,074.48
5. Step 5: Solve for x
   x = 4,617,394,074.48/78,456.59
6. Step 6: Final answer
   x = 58,852.85