Finding the Fourth Proportional to 154,778.52, 231,856.72 and 80,751

Step by Step Solution

1. Step 1: Write the proportion equation
   154,778.52 : 231,856.72 = 80,751 : x
2. Step 2: Convert to fraction form
   154,778.52/231,856.72 = 80,751/x
3. Step 3: Cross multiply
   154,778.52x = 231,856.72 × 80,751
4. Step 4: Simplify right side
   154,778.52x = 18,722,661,996.72
5. Step 5: Solve for x
   x = 18,722,661,996.72/154,778.52
6. Step 6: Final answer
   x = 120,964.21