Finding the Fourth Proportional to 105,772.39, 145,978.83 and 60,439.97

Step by Step Solution

1. Step 1: Write the proportion equation
   105,772.39 : 145,978.83 = 60,439.97 : x
2. Step 2: Convert to fraction form
   105,772.39/145,978.83 = 60,439.97/x
3. Step 3: Cross multiply
   105,772.39x = 145,978.83 × 60,439.97
4. Step 4: Simplify right side
   105,772.39x = 8,822,956,470.78
5. Step 5: Solve for x
   x = 8,822,956,470.78/105,772.39
6. Step 6: Final answer
   x = 83,414.55