Finding the Third Proportional to 647,290 and 1,408,196

Step by Step Solution

1. Step 1: Write the proportion equation
   647,290 : 1,408,196 = 1,408,196 : x
2. Step 2: Convert to fraction form
   647,290/1,408,196 = 1,408,196/x
3. Step 3: Cross multiply
   647,290x = 1,408,196 × 1,408,196
4. Step 4: Simplify right side
   647,290x = 1,983,015,974,416
5. Step 5: Solve for x
   x = 1,983,015,974,416/647,290
6. Step 6: Final answer
   x = 3,063,566.52