Finding the Fourth Proportional to 300,919.15, 451,553.69 and 123,553.45

Step by Step Solution

1. Step 1: Write the proportion equation
   300,919.15 : 451,553.69 = 123,553.45 : x
2. Step 2: Convert to fraction form
   300,919.15/451,553.69 = 123,553.45/x
3. Step 3: Cross multiply
   300,919.15x = 451,553.69 × 123,553.45
4. Step 4: Simplify right side
   300,919.15x = 55,791,016,259.73
5. Step 5: Solve for x
   x = 55,791,016,259.73/300,919.15
6. Step 6: Final answer
   x = 185,402.01