Finding the Third Proportional to 603,426 and 831,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   603,426 : 831,223.50 = 831,223.50 : x
2. Step 2: Convert to fraction form
   603,426/831,223.50 = 831,223.50/x
3. Step 3: Cross multiply
   603,426x = 831,223.50 × 831,223.50
4. Step 4: Simplify right side
   603,426x = 690,932,506,952.25
5. Step 5: Solve for x
   x = 690,932,506,952.25/603,426
6. Step 6: Final answer
   x = 1,145,016.14