Finding the Fourth Proportional to 78,597.94, 108,464.97 and 42,788.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,597.94 : 108,464.97 = 42,788.20 : x
2. Step 2: Convert to fraction form
   78,597.94/108,464.97 = 42,788.20/x
3. Step 3: Cross multiply
   78,597.94x = 108,464.97 × 42,788.20
4. Step 4: Simplify right side
   78,597.94x = 4,641,020,718.65
5. Step 5: Solve for x
   x = 4,641,020,718.65/78,597.94
6. Step 6: Final answer
   x = 59,047.61