Finding the Third Proportional to 637,899 and 866,704.50

Step by Step Solution

1. Step 1: Write the proportion equation
   637,899 : 866,704.50 = 866,704.50 : x
2. Step 2: Convert to fraction form
   637,899/866,704.50 = 866,704.50/x
3. Step 3: Cross multiply
   637,899x = 866,704.50 × 866,704.50
4. Step 4: Simplify right side
   637,899x = 751,176,690,320.25
5. Step 5: Solve for x
   x = 751,176,690,320.25/637,899
6. Step 6: Final answer
   x = 1,177,579.35