Finding the Fourth Proportional to 723,404.56, 998,310.27 and 401,128.24

Step by Step Solution

1. Step 1: Write the proportion equation
   723,404.56 : 998,310.27 = 401,128.24 : x
2. Step 2: Convert to fraction form
   723,404.56/998,310.27 = 401,128.24/x
3. Step 3: Cross multiply
   723,404.56x = 998,310.27 × 401,128.24
4. Step 4: Simplify right side
   723,404.56x = 400,450,441,579.03
5. Step 5: Solve for x
   x = 400,450,441,579.03/723,404.56
6. Step 6: Final answer
   x = 553,563.61