Finding the Third Proportional to 343,320 and 747,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   343,320 : 747,643.50 = 747,643.50 : x
2. Step 2: Convert to fraction form
   343,320/747,643.50 = 747,643.50/x
3. Step 3: Cross multiply
   343,320x = 747,643.50 × 747,643.50
4. Step 4: Simplify right side
   343,320x = 558,970,803,092.25
5. Step 5: Solve for x
   x = 558,970,803,092.25/343,320
6. Step 6: Final answer
   x = 1,628,133.53