Finding the Fourth Proportional to 105,074.88, 144,957.60 and 69,218.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,074.88 : 144,957.60 = 69,218.88 : x
2. Step 2: Convert to fraction form
   105,074.88/144,957.60 = 69,218.88/x
3. Step 3: Cross multiply
   105,074.88x = 144,957.60 × 69,218.88
4. Step 4: Simplify right side
   105,074.88x = 10,033,802,719.49
5. Step 5: Solve for x
   x = 10,033,802,719.49/105,074.88
6. Step 6: Final answer
   x = 95,491.93