Finding the Fourth Proportional to 105,467.83, 145,545.84 and 57,724.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,467.83 : 145,545.84 = 57,724.25 : x
2. Step 2: Convert to fraction form
   105,467.83/145,545.84 = 57,724.25/x
3. Step 3: Cross multiply
   105,467.83x = 145,545.84 × 57,724.25
4. Step 4: Simplify right side
   105,467.83x = 8,401,524,818.48
5. Step 5: Solve for x
   x = 8,401,524,818.48/105,467.83
6. Step 6: Final answer
   x = 79,659.60