Finding the Third Proportional to 343,404.56 and 696,513.94

Step by Step Solution

1. Step 1: Write the proportion equation
   343,404.56 : 696,513.94 = 696,513.94 : x
2. Step 2: Convert to fraction form
   343,404.56/696,513.94 = 696,513.94/x
3. Step 3: Cross multiply
   343,404.56x = 696,513.94 × 696,513.94
4. Step 4: Simplify right side
   343,404.56x = 485,131,665,131.75
5. Step 5: Solve for x
   x = 485,131,665,131.75/343,404.56
6. Step 6: Final answer
   x = 1,412,711.76