Finding the Fourth Proportional to 105,047.69, 144,965.30 and 57,300.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,047.69 : 144,965.30 = 57,300.62 : x
2. Step 2: Convert to fraction form
   105,047.69/144,965.30 = 57,300.62/x
3. Step 3: Cross multiply
   105,047.69x = 144,965.30 × 57,300.62
4. Step 4: Simplify right side
   105,047.69x = 8,306,600,557.16
5. Step 5: Solve for x
   x = 8,306,600,557.16/105,047.69
6. Step 6: Final answer
   x = 79,074.57