Finding the Third Proportional to 340,759.50 and 743,403

Step by Step Solution

1. Step 1: Write the proportion equation
   340,759.50 : 743,403 = 743,403 : x
2. Step 2: Convert to fraction form
   340,759.50/743,403 = 743,403/x
3. Step 3: Cross multiply
   340,759.50x = 743,403 × 743,403
4. Step 4: Simplify right side
   340,759.50x = 552,648,020,409
5. Step 5: Solve for x
   x = 552,648,020,409/340,759.50
6. Step 6: Final answer
   x = 1,621,812.51