Finding the Fourth Proportional to 105,909.62, 146,118.74 and 67,691.54

Step by Step Solution

1. Step 1: Write the proportion equation
   105,909.62 : 146,118.74 = 67,691.54 : x
2. Step 2: Convert to fraction form
   105,909.62/146,118.74 = 67,691.54/x
3. Step 3: Cross multiply
   105,909.62x = 146,118.74 × 67,691.54
4. Step 4: Simplify right side
   105,909.62x = 9,891,002,533.46
5. Step 5: Solve for x
   x = 9,891,002,533.46/105,909.62
6. Step 6: Final answer
   x = 93,390.97