Finding the Fourth Proportional to 105,036.27, 144,951.78 and 57,289.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,036.27 : 144,951.78 = 57,289.62 : x
2. Step 2: Convert to fraction form
   105,036.27/144,951.78 = 57,289.62/x
3. Step 3: Cross multiply
   105,036.27x = 144,951.78 × 57,289.62
4. Step 4: Simplify right side
   105,036.27x = 8,304,232,394.52
5. Step 5: Solve for x
   x = 8,304,232,394.52/105,036.27
6. Step 6: Final answer
   x = 79,060.62