Finding the Fourth Proportional to 78,468.93, 108,289.26 and 42,661.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,468.93 : 108,289.26 = 42,661.35 : x
2. Step 2: Convert to fraction form
   78,468.93/108,289.26 = 42,661.35/x
3. Step 3: Cross multiply
   78,468.93x = 108,289.26 × 42,661.35
4. Step 4: Simplify right side
   78,468.93x = 4,619,766,022.10
5. Step 5: Solve for x
   x = 4,619,766,022.10/78,468.93
6. Step 6: Final answer
   x = 58,873.82