Finding the Third Proportional to 279,711 and 613,860.75

Step by Step Solution

1. Step 1: Write the proportion equation
   279,711 : 613,860.75 = 613,860.75 : x
2. Step 2: Convert to fraction form
   279,711/613,860.75 = 613,860.75/x
3. Step 3: Cross multiply
   279,711x = 613,860.75 × 613,860.75
4. Step 4: Simplify right side
   279,711x = 376,825,020,390.56
5. Step 5: Solve for x
   x = 376,825,020,390.56/279,711
6. Step 6: Final answer
   x = 1,347,194.14