Finding the Fourth Proportional to 105,019.24, 144,922.18 and 57,271.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,019.24 : 144,922.18 = 57,271.72 : x
2. Step 2: Convert to fraction form
   105,019.24/144,922.18 = 57,271.72/x
3. Step 3: Cross multiply
   105,019.24x = 144,922.18 × 57,271.72
4. Step 4: Simplify right side
   105,019.24x = 8,299,942,514.75
5. Step 5: Solve for x
   x = 8,299,942,514.75/105,019.24
6. Step 6: Final answer
   x = 79,032.59