Finding the Third Proportional to 278,766 and 610,910

Step by Step Solution

1. Step 1: Write the proportion equation
   278,766 : 610,910 = 610,910 : x
2. Step 2: Convert to fraction form
   278,766/610,910 = 610,910/x
3. Step 3: Cross multiply
   278,766x = 610,910 × 610,910
4. Step 4: Simplify right side
   278,766x = 373,211,028,100
5. Step 5: Solve for x
   x = 373,211,028,100/278,766
6. Step 6: Final answer
   x = 1,338,796.80