Finding the Fourth Proportional to 105,080.42, 145,010.96 and 57,333.96

Step by Step Solution

1. Step 1: Write the proportion equation
   105,080.42 : 145,010.96 = 57,333.96 : x
2. Step 2: Convert to fraction form
   105,080.42/145,010.96 = 57,333.96/x
3. Step 3: Cross multiply
   105,080.42x = 145,010.96 × 57,333.96
4. Step 4: Simplify right side
   105,080.42x = 8,314,052,508.53
5. Step 5: Solve for x
   x = 8,314,052,508.53/105,080.42
6. Step 6: Final answer
   x = 79,120.85