Finding the Third Proportional to 297,079.50 and 641,508

Step by Step Solution

1. Step 1: Write the proportion equation
   297,079.50 : 641,508 = 641,508 : x
2. Step 2: Convert to fraction form
   297,079.50/641,508 = 641,508/x
3. Step 3: Cross multiply
   297,079.50x = 641,508 × 641,508
4. Step 4: Simplify right side
   297,079.50x = 411,532,514,064
5. Step 5: Solve for x
   x = 411,532,514,064/297,079.50
6. Step 6: Final answer
   x = 1,385,260.56