Finding the Fourth Proportional to 105,517.68, 158,284.71 and 30,639.05

Step by Step Solution

1. Step 1: Write the proportion equation
   105,517.68 : 158,284.71 = 30,639.05 : x
2. Step 2: Convert to fraction form
   105,517.68/158,284.71 = 30,639.05/x
3. Step 3: Cross multiply
   105,517.68x = 158,284.71 × 30,639.05
4. Step 4: Simplify right side
   105,517.68x = 4,849,693,143.93
5. Step 5: Solve for x
   x = 4,849,693,143.93/105,517.68
6. Step 6: Final answer
   x = 45,960.95