Finding the Third Proportional to 585,558 and 1,278,216

Step by Step Solution

1. Step 1: Write the proportion equation
   585,558 : 1,278,216 = 1,278,216 : x
2. Step 2: Convert to fraction form
   585,558/1,278,216 = 1,278,216/x
3. Step 3: Cross multiply
   585,558x = 1,278,216 × 1,278,216
4. Step 4: Simplify right side
   585,558x = 1,633,836,142,656
5. Step 5: Solve for x
   x = 1,633,836,142,656/585,558
6. Step 6: Final answer
   x = 2,790,220.85