Finding the Third Proportional to 517,992 and 1,221,054

Step by Step Solution

1. Step 1: Write the proportion equation
   517,992 : 1,221,054 = 1,221,054 : x
2. Step 2: Convert to fraction form
   517,992/1,221,054 = 1,221,054/x
3. Step 3: Cross multiply
   517,992x = 1,221,054 × 1,221,054
4. Step 4: Simplify right side
   517,992x = 1,490,972,870,916
5. Step 5: Solve for x
   x = 1,490,972,870,916/517,992
6. Step 6: Final answer
   x = 2,878,370.46