Finding the Fourth Proportional to 868,105.72, 1,198,061.30 and 486,125.56

Step by Step Solution

1. Step 1: Write the proportion equation
   868,105.72 : 1,198,061.30 = 486,125.56 : x
2. Step 2: Convert to fraction form
   868,105.72/1,198,061.30 = 486,125.56/x
3. Step 3: Cross multiply
   868,105.72x = 1,198,061.30 × 486,125.56
4. Step 4: Simplify right side
   868,105.72x = 582,408,220,376.83
5. Step 5: Solve for x
   x = 582,408,220,376.83/868,105.72
6. Step 6: Final answer
   x = 670,895.50