Finding the Fourth Proportional to 105,242.82, 145,233.27 and 57,494.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,242.82 : 145,233.27 = 57,494.94 : x
2. Step 2: Convert to fraction form
   105,242.82/145,233.27 = 57,494.94/x
3. Step 3: Cross multiply
   105,242.82x = 145,233.27 × 57,494.94
4. Step 4: Simplify right side
   105,242.82x = 8,350,178,144.65
5. Step 5: Solve for x
   x = 8,350,178,144.65/105,242.82
6. Step 6: Final answer
   x = 79,342.02