Finding the Fourth Proportional to 105,601.52, 145,728.89 and 57,202.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105,601.52 : 145,728.89 = 57,202.53 : x
2. Step 2: Convert to fraction form
   105,601.52/145,728.89 = 57,202.53/x
3. Step 3: Cross multiply
   105,601.52x = 145,728.89 × 57,202.53
4. Step 4: Simplify right side
   105,601.52x = 8,336,060,187.43
5. Step 5: Solve for x
   x = 8,336,060,187.43/105,601.52
6. Step 6: Final answer
   x = 78,938.83