Finding the Fourth Proportional to 105,076.09, 145,005.83 and 57,329.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,076.09 : 145,005.83 = 57,329.83 : x
2. Step 2: Convert to fraction form
   105,076.09/145,005.83 = 57,329.83/x
3. Step 3: Cross multiply
   105,076.09x = 145,005.83 × 57,329.83
4. Step 4: Simplify right side
   105,076.09x = 8,313,159,582.91
5. Step 5: Solve for x
   x = 8,313,159,582.91/105,076.09
6. Step 6: Final answer
   x = 79,115.62