Finding the Fourth Proportional to 105,610.76, 145,742.82 and 57,865.92

Step by Step Solution

1. Step 1: Write the proportion equation
   105,610.76 : 145,742.82 = 57,865.92 : x
2. Step 2: Convert to fraction form
   105,610.76/145,742.82 = 57,865.92/x
3. Step 3: Cross multiply
   105,610.76x = 145,742.82 × 57,865.92
4. Step 4: Simplify right side
   105,610.76x = 8,433,542,362.69
5. Step 5: Solve for x
   x = 8,433,542,362.69/105,610.76
6. Step 6: Final answer
   x = 79,854.95