Finding the Third Proportional to 1,081,664 and 1,681,499

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081,664 : 1,681,499 = 1,681,499 : x
2. Step 2: Convert to fraction form
   1,081,664/1,681,499 = 1,681,499/x
3. Step 3: Cross multiply
   1,081,664x = 1,681,499 × 1,681,499
4. Step 4: Simplify right side
   1,081,664x = 2,827,438,887,001
5. Step 5: Solve for x
   x = 2,827,438,887,001/1,081,664
6. Step 6: Final answer
   x = 2,613,971.52