Finding the Fourth Proportional to 105,057.83, 144,979.50 and 57,310.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,057.83 : 144,979.50 = 57,310.83 : x
2. Step 2: Convert to fraction form
   105,057.83/144,979.50 = 57,310.83/x
3. Step 3: Cross multiply
   105,057.83x = 144,979.50 × 57,310.83
4. Step 4: Simplify right side
   105,057.83x = 8,308,895,477.99
5. Step 5: Solve for x
   x = 8,308,895,477.99/105,057.83
6. Step 6: Final answer
   x = 79,088.78