Finding the Fourth Proportional to 400,978.34, 601,578.98 and 325,912.60

Step by Step Solution

1. Step 1: Write the proportion equation
   400,978.34 : 601,578.98 = 325,912.60 : x
2. Step 2: Convert to fraction form
   400,978.34/601,578.98 = 325,912.60/x
3. Step 3: Cross multiply
   400,978.34x = 601,578.98 × 325,912.60
4. Step 4: Simplify right side
   400,978.34x = 196,062,169,477.15
5. Step 5: Solve for x
   x = 196,062,169,477.15/400,978.34
6. Step 6: Final answer
   x = 488,959.50