Finding the Third Proportional to 278,820 and 611,004

Step by Step Solution

1. Step 1: Write the proportion equation
   278,820 : 611,004 = 611,004 : x
2. Step 2: Convert to fraction form
   278,820/611,004 = 611,004/x
3. Step 3: Cross multiply
   278,820x = 611,004 × 611,004
4. Step 4: Simplify right side
   278,820x = 373,325,888,016
5. Step 5: Solve for x
   x = 373,325,888,016/278,820
6. Step 6: Final answer
   x = 1,338,949.46