Finding the Fourth Proportional to 105,540.30, 145,641.24 and 57,792.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,540.30 : 145,641.24 = 57,792.83 : x
2. Step 2: Convert to fraction form
   105,540.30/145,641.24 = 57,792.83/x
3. Step 3: Cross multiply
   105,540.30x = 145,641.24 × 57,792.83
4. Step 4: Simplify right side
   105,540.30x = 8,417,018,696.10
5. Step 5: Solve for x
   x = 8,417,018,696.10/105,540.30
6. Step 6: Final answer
   x = 79,751.70