Finding the Third Proportional to 1,687,658 and 3,639,196

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687,658 : 3,639,196 = 3,639,196 : x
2. Step 2: Convert to fraction form
   1,687,658/3,639,196 = 3,639,196/x
3. Step 3: Cross multiply
   1,687,658x = 3,639,196 × 3,639,196
4. Step 4: Simplify right side
   1,687,658x = 13,243,747,526,416
5. Step 5: Solve for x
   x = 13,243,747,526,416/1,687,658
6. Step 6: Final answer
   x = 7,847,411.93