Finding the Fourth Proportional to 300,711.56, 451,012.83 and 120,789.73

Step by Step Solution

1. Step 1: Write the proportion equation
   300,711.56 : 451,012.83 = 120,789.73 : x
2. Step 2: Convert to fraction form
   300,711.56/451,012.83 = 120,789.73/x
3. Step 3: Cross multiply
   300,711.56x = 451,012.83 × 120,789.73
4. Step 4: Simplify right side
   300,711.56x = 54,477,718,073.04
5. Step 5: Solve for x
   x = 54,477,718,073.04/300,711.56
6. Step 6: Final answer
   x = 181,162.70