Finding the Fourth Proportional to 105,448.82, 145,519.37 and 57,702.17

Step by Step Solution

1. Step 1: Write the proportion equation
   105,448.82 : 145,519.37 = 57,702.17 : x
2. Step 2: Convert to fraction form
   105,448.82/145,519.37 = 57,702.17/x
3. Step 3: Cross multiply
   105,448.82x = 145,519.37 × 57,702.17
4. Step 4: Simplify right side
   105,448.82x = 8,396,783,717.70
5. Step 5: Solve for x
   x = 8,396,783,717.70/105,448.82
6. Step 6: Final answer
   x = 79,629.00