Finding the Fourth Proportional to 456,066.54, 684,211.31 and 321,393.31

Step by Step Solution

1. Step 1: Write the proportion equation
   456,066.54 : 684,211.31 = 321,393.31 : x
2. Step 2: Convert to fraction form
   456,066.54/684,211.31 = 321,393.31/x
3. Step 3: Cross multiply
   456,066.54x = 684,211.31 × 321,393.31
4. Step 4: Simplify right side
   456,066.54x = 219,900,936,753.29
5. Step 5: Solve for x
   x = 219,900,936,753.29/456,066.54
6. Step 6: Final answer
   x = 482,168.54