Finding the Fourth Proportional to 78,698.92, 108,601.35 and 42,888.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,698.92 : 108,601.35 = 42,888.17 : x
2. Step 2: Convert to fraction form
   78,698.92/108,601.35 = 42,888.17/x
3. Step 3: Cross multiply
   78,698.92x = 108,601.35 × 42,888.17
4. Step 4: Simplify right side
   78,698.92x = 4,657,713,161.03
5. Step 5: Solve for x
   x = 4,657,713,161.03/78,698.92
6. Step 6: Final answer
   x = 59,183.95