Finding the Fourth Proportional to 400,978.09, 601,578.61 and 325,912.35

Step by Step Solution

1. Step 1: Write the proportion equation
   400,978.09 : 601,578.61 = 325,912.35 : x
2. Step 2: Convert to fraction form
   400,978.09/601,578.61 = 325,912.35/x
3. Step 3: Cross multiply
   400,978.09x = 601,578.61 × 325,912.35
4. Step 4: Simplify right side
   400,978.09x = 196,061,897,680.05
5. Step 5: Solve for x
   x = 196,061,897,680.05/400,978.09
6. Step 6: Final answer
   x = 488,959.13