Finding the Fourth Proportional to 738,362.72, 1,018,941 and 398,831

Step by Step Solution

1. Step 1: Write the proportion equation
   738,362.72 : 1,018,941 = 398,831 : x
2. Step 2: Convert to fraction form
   738,362.72/1,018,941 = 398,831/x
3. Step 3: Cross multiply
   738,362.72x = 1,018,941 × 398,831
4. Step 4: Simplify right side
   738,362.72x = 406,385,257,971
5. Step 5: Solve for x
   x = 406,385,257,971/738,362.72
6. Step 6: Final answer
   x = 550,387.02