Finding the Third Proportional to 297,085.50 and 641,517

Step by Step Solution

1. Step 1: Write the proportion equation
   297,085.50 : 641,517 = 641,517 : x
2. Step 2: Convert to fraction form
   297,085.50/641,517 = 641,517/x
3. Step 3: Cross multiply
   297,085.50x = 641,517 × 641,517
4. Step 4: Simplify right side
   297,085.50x = 411,544,061,289
5. Step 5: Solve for x
   x = 411,544,061,289/297,085.50
6. Step 6: Final answer
   x = 1,385,271.45