Finding the Third Proportional to 297,126 and 640,453.50

Step by Step Solution

1. Step 1: Write the proportion equation
   297,126 : 640,453.50 = 640,453.50 : x
2. Step 2: Convert to fraction form
   297,126/640,453.50 = 640,453.50/x
3. Step 3: Cross multiply
   297,126x = 640,453.50 × 640,453.50
4. Step 4: Simplify right side
   297,126x = 410,180,685,662.25
5. Step 5: Solve for x
   x = 410,180,685,662.25/297,126
6. Step 6: Final answer
   x = 1,380,494.09