Finding the Fourth Proportional to 105,314.88, 145,337.12 and 57,570.24

Step by Step Solution

1. Step 1: Write the proportion equation
   105,314.88 : 145,337.12 = 57,570.24 : x
2. Step 2: Convert to fraction form
   105,314.88/145,337.12 = 57,570.24/x
3. Step 3: Cross multiply
   105,314.88x = 145,337.12 × 57,570.24
4. Step 4: Simplify right side
   105,314.88x = 8,367,092,879.31
5. Step 5: Solve for x
   x = 8,367,092,879.31/105,314.88
6. Step 6: Final answer
   x = 79,448.34