Finding the Fourth Proportional to 105,078.75, 145,008.69 and 67,353.09

Step by Step Solution

1. Step 1: Write the proportion equation
   105,078.75 : 145,008.69 = 67,353.09 : x
2. Step 2: Convert to fraction form
   105,078.75/145,008.69 = 67,353.09/x
3. Step 3: Cross multiply
   105,078.75x = 145,008.69 × 67,353.09
4. Step 4: Simplify right side
   105,078.75x = 9,766,783,348.35
5. Step 5: Solve for x
   x = 9,766,783,348.35/105,078.75
6. Step 6: Final answer
   x = 92,947.27