Finding the Third Proportional to 427,398 and 676,774.50

Step by Step Solution

1. Step 1: Write the proportion equation
   427,398 : 676,774.50 = 676,774.50 : x
2. Step 2: Convert to fraction form
   427,398/676,774.50 = 676,774.50/x
3. Step 3: Cross multiply
   427,398x = 676,774.50 × 676,774.50
4. Step 4: Simplify right side
   427,398x = 458,023,723,850.25
5. Step 5: Solve for x
   x = 458,023,723,850.25/427,398
6. Step 6: Final answer
   x = 1,071,656.22