Finding the Fourth Proportional to 105,513.30, 145,608.42 and 57,766.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,513.30 : 145,608.42 = 57,766.62 : x
2. Step 2: Convert to fraction form
   105,513.30/145,608.42 = 57,766.62/x
3. Step 3: Cross multiply
   105,513.30x = 145,608.42 × 57,766.62
4. Step 4: Simplify right side
   105,513.30x = 8,411,306,266.94
5. Step 5: Solve for x
   x = 8,411,306,266.94/105,513.30
6. Step 6: Final answer
   x = 79,717.97