Finding the Fourth Proportional to 105,613.88, 145,747.15 and 57,868.93

Step by Step Solution

1. Step 1: Write the proportion equation
   105,613.88 : 145,747.15 = 57,868.93 : x
2. Step 2: Convert to fraction form
   105,613.88/145,747.15 = 57,868.93/x
3. Step 3: Cross multiply
   105,613.88x = 145,747.15 × 57,868.93
4. Step 4: Simplify right side
   105,613.88x = 8,434,231,658.56
5. Step 5: Solve for x
   x = 8,434,231,658.56/105,613.88
6. Step 6: Final answer
   x = 79,859.13