Finding the Fourth Proportional to 1,226.72, 1,839.38 and 404.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,226.72 : 1,839.38 = 404.77 : x
2. Step 2: Convert to fraction form
   1,226.72/1,839.38 = 404.77/x
3. Step 3: Cross multiply
   1,226.72x = 1,839.38 × 404.77
4. Step 4: Simplify right side
   1,226.72x = 744,523.82
5. Step 5: Solve for x
   x = 744,523.82/1,226.72
6. Step 6: Final answer
   x = 606.92