Finding the Third Proportional to 279,711 and 613,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,711 : 613,858.50 = 613,858.50 : x
2. Step 2: Convert to fraction form
   279,711/613,858.50 = 613,858.50/x
3. Step 3: Cross multiply
   279,711x = 613,858.50 × 613,858.50
4. Step 4: Simplify right side
   279,711x = 376,822,258,022.25
5. Step 5: Solve for x
   x = 376,822,258,022.25/279,711
6. Step 6: Final answer
   x = 1,347,184.27