Finding the Fourth Proportional to 406,660.72, 561,183.72 and 245,522.56

Step by Step Solution

1. Step 1: Write the proportion equation
   406,660.72 : 561,183.72 = 245,522.56 : x
2. Step 2: Convert to fraction form
   406,660.72/561,183.72 = 245,522.56/x
3. Step 3: Cross multiply
   406,660.72x = 561,183.72 × 245,522.56
4. Step 4: Simplify right side
   406,660.72x = 137,783,263,564.72
5. Step 5: Solve for x
   x = 137,783,263,564.72/406,660.72
6. Step 6: Final answer
   x = 338,816.26