Finding the Fourth Proportional to 78,708.94, 108,615.18 and 42,898.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,708.94 : 108,615.18 = 42,898.18 : x
2. Step 2: Convert to fraction form
   78,708.94/108,615.18 = 42,898.18/x
3. Step 3: Cross multiply
   78,708.94x = 108,615.18 × 42,898.18
4. Step 4: Simplify right side
   78,708.94x = 4,659,393,542.37
5. Step 5: Solve for x
   x = 4,659,393,542.37/78,708.94
6. Step 6: Final answer
   x = 59,197.77