Finding the Third Proportional to 687,066 and 903,490

Step by Step Solution

1. Step 1: Write the proportion equation
   687,066 : 903,490 = 903,490 : x
2. Step 2: Convert to fraction form
   687,066/903,490 = 903,490/x
3. Step 3: Cross multiply
   687,066x = 903,490 × 903,490
4. Step 4: Simplify right side
   687,066x = 816,294,180,100
5. Step 5: Solve for x
   x = 816,294,180,100/687,066
6. Step 6: Final answer
   x = 1,188,087.00