Finding the Third Proportional to 401,575.50 and 621,801

Step by Step Solution

1. Step 1: Write the proportion equation
   401,575.50 : 621,801 = 621,801 : x
2. Step 2: Convert to fraction form
   401,575.50/621,801 = 621,801/x
3. Step 3: Cross multiply
   401,575.50x = 621,801 × 621,801
4. Step 4: Simplify right side
   401,575.50x = 386,636,483,601
5. Step 5: Solve for x
   x = 386,636,483,601/401,575.50
6. Step 6: Final answer
   x = 962,798.98