Finding the Fourth Proportional to 105,568.92, 145,685.16 and 57,825.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,568.92 : 145,685.16 = 57,825.30 : x
2. Step 2: Convert to fraction form
   105,568.92/145,685.16 = 57,825.30/x
3. Step 3: Cross multiply
   105,568.92x = 145,685.16 × 57,825.30
4. Step 4: Simplify right side
   105,568.92x = 8,424,288,082.55
5. Step 5: Solve for x
   x = 8,424,288,082.55/105,568.92
6. Step 6: Final answer
   x = 79,798.94