Finding the Third Proportional to 405,603.50 and 636,244

Step by Step Solution

1. Step 1: Write the proportion equation
   405,603.50 : 636,244 = 636,244 : x
2. Step 2: Convert to fraction form
   405,603.50/636,244 = 636,244/x
3. Step 3: Cross multiply
   405,603.50x = 636,244 × 636,244
4. Step 4: Simplify right side
   405,603.50x = 404,806,427,536
5. Step 5: Solve for x
   x = 404,806,427,536/405,603.50
6. Step 6: Final answer
   x = 998,034.85