Finding the Third Proportional to 615,120 and 827,540

Step by Step Solution

1. Step 1: Write the proportion equation
   615,120 : 827,540 = 827,540 : x
2. Step 2: Convert to fraction form
   615,120/827,540 = 827,540/x
3. Step 3: Cross multiply
   615,120x = 827,540 × 827,540
4. Step 4: Simplify right side
   615,120x = 684,822,451,600
5. Step 5: Solve for x
   x = 684,822,451,600/615,120
6. Step 6: Final answer
   x = 1,113,315.21