Finding the Third Proportional to 411,196.50 and 645,192

Step by Step Solution

1. Step 1: Write the proportion equation
   411,196.50 : 645,192 = 645,192 : x
2. Step 2: Convert to fraction form
   411,196.50/645,192 = 645,192/x
3. Step 3: Cross multiply
   411,196.50x = 645,192 × 645,192
4. Step 4: Simplify right side
   411,196.50x = 416,272,716,864
5. Step 5: Solve for x
   x = 416,272,716,864/411,196.50
6. Step 6: Final answer
   x = 1,012,344.99