Finding the Third Proportional to 677,644.50 and 903,406

Step by Step Solution

1. Step 1: Write the proportion equation
   677,644.50 : 903,406 = 903,406 : x
2. Step 2: Convert to fraction form
   677,644.50/903,406 = 903,406/x
3. Step 3: Cross multiply
   677,644.50x = 903,406 × 903,406
4. Step 4: Simplify right side
   677,644.50x = 816,142,400,836
5. Step 5: Solve for x
   x = 816,142,400,836/677,644.50
6. Step 6: Final answer
   x = 1,204,381.35