Finding the Fourth Proportional to 105,426.36, 145,511.73 and 72,766.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,426.36 : 145,511.73 = 72,766.62 : x
2. Step 2: Convert to fraction form
   105,426.36/145,511.73 = 72,766.62/x
3. Step 3: Cross multiply
   105,426.36x = 145,511.73 × 72,766.62
4. Step 4: Simplify right side
   105,426.36x = 10,588,396,398.62
5. Step 5: Solve for x
   x = 10,588,396,398.62/105,426.36
6. Step 6: Final answer
   x = 100,434.06