Finding the Third Proportional to 397,885.50 and 814,153.50

Step by Step Solution

1. Step 1: Write the proportion equation
   397,885.50 : 814,153.50 = 814,153.50 : x
2. Step 2: Convert to fraction form
   397,885.50/814,153.50 = 814,153.50/x
3. Step 3: Cross multiply
   397,885.50x = 814,153.50 × 814,153.50
4. Step 4: Simplify right side
   397,885.50x = 662,845,921,562.25
5. Step 5: Solve for x
   x = 662,845,921,562.25/397,885.50
6. Step 6: Final answer
   x = 1,665,921.28