Finding the Third Proportional to 611,648 and 899,445

Step by Step Solution

1. Step 1: Write the proportion equation
   611,648 : 899,445 = 899,445 : x
2. Step 2: Convert to fraction form
   611,648/899,445 = 899,445/x
3. Step 3: Cross multiply
   611,648x = 899,445 × 899,445
4. Step 4: Simplify right side
   611,648x = 809,001,308,025
5. Step 5: Solve for x
   x = 809,001,308,025/611,648
6. Step 6: Final answer
   x = 1,322,658.31