Finding the Third Proportional to 663,403 and 994,061

Step by Step Solution

1. Step 1: Write the proportion equation
   663,403 : 994,061 = 994,061 : x
2. Step 2: Convert to fraction form
   663,403/994,061 = 994,061/x
3. Step 3: Cross multiply
   663,403x = 994,061 × 994,061
4. Step 4: Simplify right side
   663,403x = 988,157,271,721
5. Step 5: Solve for x
   x = 988,157,271,721/663,403
6. Step 6: Final answer
   x = 1,489,527.89