Finding the Third Proportional to 588,216 and 1,288,440

Step by Step Solution

1. Step 1: Write the proportion equation
   588,216 : 1,288,440 = 1,288,440 : x
2. Step 2: Convert to fraction form
   588,216/1,288,440 = 1,288,440/x
3. Step 3: Cross multiply
   588,216x = 1,288,440 × 1,288,440
4. Step 4: Simplify right side
   588,216x = 1,660,077,633,600
5. Step 5: Solve for x
   x = 1,660,077,633,600/588,216
6. Step 6: Final answer
   x = 2,822,224.55