Finding the Fourth Proportional to 78,464.43, 108,283.05 and 42,656.85

Step by Step Solution

1. Step 1: Write the proportion equation
   78,464.43 : 108,283.05 = 42,656.85 : x
2. Step 2: Convert to fraction form
   78,464.43/108,283.05 = 42,656.85/x
3. Step 3: Cross multiply
   78,464.43x = 108,283.05 × 42,656.85
4. Step 4: Simplify right side
   78,464.43x = 4,619,013,821.39
5. Step 5: Solve for x
   x = 4,619,013,821.39/78,464.43
6. Step 6: Final answer
   x = 58,867.61