Finding the Third Proportional to 323,416.50 and 680,346

Step by Step Solution

1. Step 1: Write the proportion equation
   323,416.50 : 680,346 = 680,346 : x
2. Step 2: Convert to fraction form
   323,416.50/680,346 = 680,346/x
3. Step 3: Cross multiply
   323,416.50x = 680,346 × 680,346
4. Step 4: Simplify right side
   323,416.50x = 462,870,679,716
5. Step 5: Solve for x
   x = 462,870,679,716/323,416.50
6. Step 6: Final answer
   x = 1,431,190.68