Finding the Third Proportional to 405,748.30 and 630,771.52

Step by Step Solution

1. Step 1: Write the proportion equation
   405,748.30 : 630,771.52 = 630,771.52 : x
2. Step 2: Convert to fraction form
   405,748.30/630,771.52 = 630,771.52/x
3. Step 3: Cross multiply
   405,748.30x = 630,771.52 × 630,771.52
4. Step 4: Simplify right side
   405,748.30x = 397,872,712,315.72
5. Step 5: Solve for x
   x = 397,872,712,315.72/405,748.30
6. Step 6: Final answer
   x = 980,589.97