Finding the Fourth Proportional to 456,132.86, 684,310.56 and 321,459.42

Step by Step Solution

1. Step 1: Write the proportion equation
   456,132.86 : 684,310.56 = 321,459.42 : x
2. Step 2: Convert to fraction form
   456,132.86/684,310.56 = 321,459.42/x
3. Step 3: Cross multiply
   456,132.86x = 684,310.56 × 321,459.42
4. Step 4: Simplify right side
   456,132.86x = 219,978,075,717.48
5. Step 5: Solve for x
   x = 219,978,075,717.48/456,132.86
6. Step 6: Final answer
   x = 482,267.55