Finding the Fourth Proportional to 972,978.89, 1,458,978.35 and 324,325.42

Step by Step Solution

1. Step 1: Write the proportion equation
   972,978.89 : 1,458,978.35 = 324,325.42 : x
2. Step 2: Convert to fraction form
   972,978.89/1,458,978.35 = 324,325.42/x
3. Step 3: Cross multiply
   972,978.89x = 1,458,978.35 × 324,325.42
4. Step 4: Simplify right side
   972,978.89x = 473,183,760,865.58
5. Step 5: Solve for x
   x = 473,183,760,865.58/972,978.89
6. Step 6: Final answer
   x = 486,324.80