Finding the Fourth Proportional to 78,401.75, 108,193.91 and 42,591.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,401.75 : 108,193.91 = 42,591.42 : x
2. Step 2: Convert to fraction form
   78,401.75/108,193.91 = 42,591.42/x
3. Step 3: Cross multiply
   78,401.75x = 108,193.91 × 42,591.42
4. Step 4: Simplify right side
   78,401.75x = 4,608,132,049.30
5. Step 5: Solve for x
   x = 4,608,132,049.30/78,401.75
6. Step 6: Final answer
   x = 58,775.89