Finding the Third Proportional to 515,918 and 1,068,288

Step by Step Solution

1. Step 1: Write the proportion equation
   515,918 : 1,068,288 = 1,068,288 : x
2. Step 2: Convert to fraction form
   515,918/1,068,288 = 1,068,288/x
3. Step 3: Cross multiply
   515,918x = 1,068,288 × 1,068,288
4. Step 4: Simplify right side
   515,918x = 1,141,239,250,944
5. Step 5: Solve for x
   x = 1,141,239,250,944/515,918
6. Step 6: Final answer
   x = 2,212,055.50