Finding the Third Proportional to 343,513 and 746,105

Step by Step Solution

1. Step 1: Write the proportion equation
   343,513 : 746,105 = 746,105 : x
2. Step 2: Convert to fraction form
   343,513/746,105 = 746,105/x
3. Step 3: Cross multiply
   343,513x = 746,105 × 746,105
4. Step 4: Simplify right side
   343,513x = 556,672,671,025
5. Step 5: Solve for x
   x = 556,672,671,025/343,513
6. Step 6: Final answer
   x = 1,620,528.69