Finding the Fourth Proportional to 78,634.68, 108,517.78 and 42,826.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,634.68 : 108,517.78 = 42,826.62 : x
2. Step 2: Convert to fraction form
   78,634.68/108,517.78 = 42,826.62/x
3. Step 3: Cross multiply
   78,634.68x = 108,517.78 × 42,826.62
4. Step 4: Simplify right side
   78,634.68x = 4,647,449,727.30
5. Step 5: Solve for x
   x = 4,647,449,727.30/78,634.68
6. Step 6: Final answer
   x = 59,101.78