Finding the Third Proportional to 307,401 and 630,111

Step by Step Solution

1. Step 1: Write the proportion equation
   307,401 : 630,111 = 630,111 : x
2. Step 2: Convert to fraction form
   307,401/630,111 = 630,111/x
3. Step 3: Cross multiply
   307,401x = 630,111 × 630,111
4. Step 4: Simplify right side
   307,401x = 397,039,872,321
5. Step 5: Solve for x
   x = 397,039,872,321/307,401
6. Step 6: Final answer
   x = 1,291,602.41