Finding the Fourth Proportional to 105,782.59, 145,950.84 and 68,078.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,782.59 : 145,950.84 = 68,078.71 : x
2. Step 2: Convert to fraction form
   105,782.59/145,950.84 = 68,078.71/x
3. Step 3: Cross multiply
   105,782.59x = 145,950.84 × 68,078.71
4. Step 4: Simplify right side
   105,782.59x = 9,936,144,910.62
5. Step 5: Solve for x
   x = 9,936,144,910.62/105,782.59
6. Step 6: Final answer
   x = 93,929.87