Finding the Fourth Proportional to 78,401.90, 108,192.26 and 42,591.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,401.90 : 108,192.26 = 42,591.83 : x
2. Step 2: Convert to fraction form
   78,401.90/108,192.26 = 42,591.83/x
3. Step 3: Cross multiply
   78,401.90x = 108,192.26 × 42,591.83
4. Step 4: Simplify right side
   78,401.90x = 4,608,105,671.18
5. Step 5: Solve for x
   x = 4,608,105,671.18/78,401.90
6. Step 6: Final answer
   x = 58,775.43