Finding the Third Proportional to 553,116 and 1,206,345

Step by Step Solution

1. Step 1: Write the proportion equation
   553,116 : 1,206,345 = 1,206,345 : x
2. Step 2: Convert to fraction form
   553,116/1,206,345 = 1,206,345/x
3. Step 3: Cross multiply
   553,116x = 1,206,345 × 1,206,345
4. Step 4: Simplify right side
   553,116x = 1,455,268,259,025
5. Step 5: Solve for x
   x = 1,455,268,259,025/553,116
6. Step 6: Final answer
   x = 2,631,036.27