Finding the Fourth Proportional to 831,321.72, 1,147,223.31 and 449,348.49

Step by Step Solution

1. Step 1: Write the proportion equation
   831,321.72 : 1,147,223.31 = 449,348.49 : x
2. Step 2: Convert to fraction form
   831,321.72/1,147,223.31 = 449,348.49/x
3. Step 3: Cross multiply
   831,321.72x = 1,147,223.31 × 449,348.49
4. Step 4: Simplify right side
   831,321.72x = 515,503,062,041.30
5. Step 5: Solve for x
   x = 515,503,062,041.30/831,321.72
6. Step 6: Final answer
   x = 620,100.56