Finding the Third Proportional to 1,689,438 and 3,498,639

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689,438 : 3,498,639 = 3,498,639 : x
2. Step 2: Convert to fraction form
   1,689,438/3,498,639 = 3,498,639/x
3. Step 3: Cross multiply
   1,689,438x = 3,498,639 × 3,498,639
4. Step 4: Simplify right side
   1,689,438x = 12,240,474,852,321
5. Step 5: Solve for x
   x = 12,240,474,852,321/1,689,438
6. Step 6: Final answer
   x = 7,245,293.91