Finding the Fourth Proportional to 105,693.05, 145,853.25 and 57,944.77

Step by Step Solution

1. Step 1: Write the proportion equation
   105,693.05 : 145,853.25 = 57,944.77 : x
2. Step 2: Convert to fraction form
   105,693.05/145,853.25 = 57,944.77/x
3. Step 3: Cross multiply
   105,693.05x = 145,853.25 × 57,944.77
4. Step 4: Simplify right side
   105,693.05x = 8,451,433,025.00
5. Step 5: Solve for x
   x = 8,451,433,025.00/105,693.05
6. Step 6: Final answer
   x = 79,962.05