Finding the Third Proportional to 401,935.50 and 621,796.50

Step by Step Solution

1. Step 1: Write the proportion equation
   401,935.50 : 621,796.50 = 621,796.50 : x
2. Step 2: Convert to fraction form
   401,935.50/621,796.50 = 621,796.50/x
3. Step 3: Cross multiply
   401,935.50x = 621,796.50 × 621,796.50
4. Step 4: Simplify right side
   401,935.50x = 386,630,887,412.25
5. Step 5: Solve for x
   x = 386,630,887,412.25/401,935.50
6. Step 6: Final answer
   x = 961,922.71