Finding the Third Proportional to 405,623.25 and 630,561.38

Step by Step Solution

1. Step 1: Write the proportion equation
   405,623.25 : 630,561.38 = 630,561.38 : x
2. Step 2: Convert to fraction form
   405,623.25/630,561.38 = 630,561.38/x
3. Step 3: Cross multiply
   405,623.25x = 630,561.38 × 630,561.38
4. Step 4: Simplify right side
   405,623.25x = 397,607,647,641.89
5. Step 5: Solve for x
   x = 397,607,647,641.89/405,623.25
6. Step 6: Final answer
   x = 980,238.80