Finding the Fourth Proportional to 105,229.96, 145,212.06 and 57,474.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105,229.96 : 145,212.06 = 57,474.52 : x
2. Step 2: Convert to fraction form
   105,229.96/145,212.06 = 57,474.52/x
3. Step 3: Cross multiply
   105,229.96x = 145,212.06 × 57,474.52
4. Step 4: Simplify right side
   105,229.96x = 8,345,993,446.71
5. Step 5: Solve for x
   x = 8,345,993,446.71/105,229.96
6. Step 6: Final answer
   x = 79,311.95