Finding the Third Proportional to 640,886 and 1,364,608

Step by Step Solution

1. Step 1: Write the proportion equation
   640,886 : 1,364,608 = 1,364,608 : x
2. Step 2: Convert to fraction form
   640,886/1,364,608 = 1,364,608/x
3. Step 3: Cross multiply
   640,886x = 1,364,608 × 1,364,608
4. Step 4: Simplify right side
   640,886x = 1,862,154,993,664
5. Step 5: Solve for x
   x = 1,862,154,993,664/640,886
6. Step 6: Final answer
   x = 2,905,594.74