Finding the Third Proportional to 323,406 and 691,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   323,406 : 691,144.50 = 691,144.50 : x
2. Step 2: Convert to fraction form
   323,406/691,144.50 = 691,144.50/x
3. Step 3: Cross multiply
   323,406x = 691,144.50 × 691,144.50
4. Step 4: Simplify right side
   323,406x = 477,680,719,880.25
5. Step 5: Solve for x
   x = 477,680,719,880.25/323,406
6. Step 6: Final answer
   x = 1,477,031.10