Finding the Fourth Proportional to 105,072.88, 144,954.84 and 69,216.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,072.88 : 144,954.84 = 69,216.88 : x
2. Step 2: Convert to fraction form
   105,072.88/144,954.84 = 69,216.88/x
3. Step 3: Cross multiply
   105,072.88x = 144,954.84 × 69,216.88
4. Step 4: Simplify right side
   105,072.88x = 10,033,321,765.70
5. Step 5: Solve for x
   x = 10,033,321,765.70/105,072.88
6. Step 6: Final answer
   x = 95,489.17