Finding the Third Proportional to 1,355,638 and 2,921,389

Step by Step Solution

1. Step 1: Write the proportion equation
   1,355,638 : 2,921,389 = 2,921,389 : x
2. Step 2: Convert to fraction form
   1,355,638/2,921,389 = 2,921,389/x
3. Step 3: Cross multiply
   1,355,638x = 2,921,389 × 2,921,389
4. Step 4: Simplify right side
   1,355,638x = 8,534,513,689,321
5. Step 5: Solve for x
   x = 8,534,513,689,321/1,355,638
6. Step 6: Final answer
   x = 6,295,569.83