Finding the Fourth Proportional to 405,410.56, 559,515.24 and 235,644.72

Step by Step Solution

1. Step 1: Write the proportion equation
   405,410.56 : 559,515.24 = 235,644.72 : x
2. Step 2: Convert to fraction form
   405,410.56/559,515.24 = 235,644.72/x
3. Step 3: Cross multiply
   405,410.56x = 559,515.24 × 235,644.72
4. Step 4: Simplify right side
   405,410.56x = 131,846,812,065.53
5. Step 5: Solve for x
   x = 131,846,812,065.53/405,410.56
6. Step 6: Final answer
   x = 325,218.00