Finding the Fourth Proportional to 105,169.74, 145,132.35 and 57,422.22

Step by Step Solution

1. Step 1: Write the proportion equation
   105,169.74 : 145,132.35 = 57,422.22 : x
2. Step 2: Convert to fraction form
   105,169.74/145,132.35 = 57,422.22/x
3. Step 3: Cross multiply
   105,169.74x = 145,132.35 × 57,422.22
4. Step 4: Simplify right side
   105,169.74x = 8,333,821,730.82
5. Step 5: Solve for x
   x = 8,333,821,730.82/105,169.74
6. Step 6: Final answer
   x = 79,241.63