Finding the Fourth Proportional to 300,912.80, 451,369.12 and 123,298.56

Step by Step Solution

1. Step 1: Write the proportion equation
   300,912.80 : 451,369.12 = 123,298.56 : x
2. Step 2: Convert to fraction form
   300,912.80/451,369.12 = 123,298.56/x
3. Step 3: Cross multiply
   300,912.80x = 451,369.12 × 123,298.56
4. Step 4: Simplify right side
   300,912.80x = 55,653,162,524.47
5. Step 5: Solve for x
   x = 55,653,162,524.47/300,912.80
6. Step 6: Final answer
   x = 184,947.81