Finding the Fourth Proportional to 105,012.48, 144,911.52 and 60,300.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,012.48 : 144,911.52 = 60,300.48 : x
2. Step 2: Convert to fraction form
   105,012.48/144,911.52 = 60,300.48/x
3. Step 3: Cross multiply
   105,012.48x = 144,911.52 × 60,300.48
4. Step 4: Simplify right side
   105,012.48x = 8,738,234,213.53
5. Step 5: Solve for x
   x = 8,738,234,213.53/105,012.48
6. Step 6: Final answer
   x = 83,211.39