Finding the Fourth Proportional to 80,949.72, 111,710.97 and 45,139.62

Step by Step Solution

1. Step 1: Write the proportion equation
   80,949.72 : 111,710.97 = 45,139.62 : x
2. Step 2: Convert to fraction form
   80,949.72/111,710.97 = 45,139.62/x
3. Step 3: Cross multiply
   80,949.72x = 111,710.97 × 45,139.62
4. Step 4: Simplify right side
   80,949.72x = 5,042,590,735.63
5. Step 5: Solve for x
   x = 5,042,590,735.63/80,949.72
6. Step 6: Final answer
   x = 62,292.87