Finding the Fourth Proportional to 723,270.72, 998,086.56 and 405,298.24

Step by Step Solution

1. Step 1: Write the proportion equation
   723,270.72 : 998,086.56 = 405,298.24 : x
2. Step 2: Convert to fraction form
   723,270.72/998,086.56 = 405,298.24/x
3. Step 3: Cross multiply
   723,270.72x = 998,086.56 × 405,298.24
4. Step 4: Simplify right side
   723,270.72x = 404,522,726,135.65
5. Step 5: Solve for x
   x = 404,522,726,135.65/723,270.72
6. Step 6: Final answer
   x = 559,296.42