Finding the Third Proportional to 411,393 and 621,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   411,393 : 621,475.50 = 621,475.50 : x
2. Step 2: Convert to fraction form
   411,393/621,475.50 = 621,475.50/x
3. Step 3: Cross multiply
   411,393x = 621,475.50 × 621,475.50
4. Step 4: Simplify right side
   411,393x = 386,231,797,100.25
5. Step 5: Solve for x
   x = 386,231,797,100.25/411,393
6. Step 6: Final answer
   x = 938,839.01