Finding the Fourth Proportional to 105,471.41, 145,550.78 and 57,727.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,471.41 : 145,550.78 = 57,727.82 : x
2. Step 2: Convert to fraction form
   105,471.41/145,550.78 = 57,727.82/x
3. Step 3: Cross multiply
   105,471.41x = 145,550.78 × 57,727.82
4. Step 4: Simplify right side
   105,471.41x = 8,402,328,212.31
5. Step 5: Solve for x
   x = 8,402,328,212.31/105,471.41
6. Step 6: Final answer
   x = 79,664.51