Finding the Fourth Proportional to 105,424.97, 145,546.61 and 69,718.55

Step by Step Solution

1. Step 1: Write the proportion equation
   105,424.97 : 145,546.61 = 69,718.55 : x
2. Step 2: Convert to fraction form
   105,424.97/145,546.61 = 69,718.55/x
3. Step 3: Cross multiply
   105,424.97x = 145,546.61 × 69,718.55
4. Step 4: Simplify right side
   105,424.97x = 10,147,297,530.29
5. Step 5: Solve for x
   x = 10,147,297,530.29/105,424.97
6. Step 6: Final answer
   x = 96,251.37