Finding the Third Proportional to 345,986 and 743,703.50

Step by Step Solution

1. Step 1: Write the proportion equation
   345,986 : 743,703.50 = 743,703.50 : x
2. Step 2: Convert to fraction form
   345,986/743,703.50 = 743,703.50/x
3. Step 3: Cross multiply
   345,986x = 743,703.50 × 743,703.50
4. Step 4: Simplify right side
   345,986x = 553,094,895,912.25
5. Step 5: Solve for x
   x = 553,094,895,912.25/345,986
6. Step 6: Final answer
   x = 1,598,604.85