Finding the Third Proportional to 677,687 and 903,458.50

Step by Step Solution

1. Step 1: Write the proportion equation
   677,687 : 903,458.50 = 903,458.50 : x
2. Step 2: Convert to fraction form
   677,687/903,458.50 = 903,458.50/x
3. Step 3: Cross multiply
   677,687x = 903,458.50 × 903,458.50
4. Step 4: Simplify right side
   677,687x = 816,237,261,222.25
5. Step 5: Solve for x
   x = 816,237,261,222.25/677,687
6. Step 6: Final answer
   x = 1,204,445.80