Finding the Fourth Proportional to 105,815.39, 146,146.52 and 69,678.39

Step by Step Solution

1. Step 1: Write the proportion equation
   105,815.39 : 146,146.52 = 69,678.39 : x
2. Step 2: Convert to fraction form
   105,815.39/146,146.52 = 69,678.39/x
3. Step 3: Cross multiply
   105,815.39x = 146,146.52 × 69,678.39
4. Step 4: Simplify right side
   105,815.39x = 10,183,253,943.70
5. Step 5: Solve for x
   x = 10,183,253,943.70/105,815.39
6. Step 6: Final answer
   x = 96,236.04