Finding the Third Proportional to 1,638,616 and 3,342,289

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638,616 : 3,342,289 = 3,342,289 : x
2. Step 2: Convert to fraction form
   1,638,616/3,342,289 = 3,342,289/x
3. Step 3: Cross multiply
   1,638,616x = 3,342,289 × 3,342,289
4. Step 4: Simplify right side
   1,638,616x = 11,170,895,759,521
5. Step 5: Solve for x
   x = 11,170,895,759,521/1,638,616
6. Step 6: Final answer
   x = 6,817,274.92