Finding the Fourth Proportional to 78,709.49, 108,615.92 and 42,898.73

Step by Step Solution

1. Step 1: Write the proportion equation
   78,709.49 : 108,615.92 = 42,898.73 : x
2. Step 2: Convert to fraction form
   78,709.49/108,615.92 = 42,898.73/x
3. Step 3: Cross multiply
   78,709.49x = 108,615.92 × 42,898.73
4. Step 4: Simplify right side
   78,709.49x = 4,659,485,025.78
5. Step 5: Solve for x
   x = 4,659,485,025.78/78,709.49
6. Step 6: Final answer
   x = 59,198.52