Finding the Fourth Proportional to 105,250.82, 145,238.55 and 57,494.03

Step by Step Solution

1. Step 1: Write the proportion equation
   105,250.82 : 145,238.55 = 57,494.03 : x
2. Step 2: Convert to fraction form
   105,250.82/145,238.55 = 57,494.03/x
3. Step 3: Cross multiply
   105,250.82x = 145,238.55 × 57,494.03
4. Step 4: Simplify right side
   105,250.82x = 8,350,349,550.86
5. Step 5: Solve for x
   x = 8,350,349,550.86/105,250.82
6. Step 6: Final answer
   x = 79,337.62