Finding the Third Proportional to 603,448.50 and 831,258

Step by Step Solution

1. Step 1: Write the proportion equation
   603,448.50 : 831,258 = 831,258 : x
2. Step 2: Convert to fraction form
   603,448.50/831,258 = 831,258/x
3. Step 3: Cross multiply
   603,448.50x = 831,258 × 831,258
4. Step 4: Simplify right side
   603,448.50x = 690,989,862,564
5. Step 5: Solve for x
   x = 690,989,862,564/603,448.50
6. Step 6: Final answer
   x = 1,145,068.49