Finding the Third Proportional to 2,139,198 and 3,209,259

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,198 : 3,209,259 = 3,209,259 : x
2. Step 2: Convert to fraction form
   2,139,198/3,209,259 = 3,209,259/x
3. Step 3: Cross multiply
   2,139,198x = 3,209,259 × 3,209,259
4. Step 4: Simplify right side
   2,139,198x = 10,299,343,329,081
5. Step 5: Solve for x
   x = 10,299,343,329,081/2,139,198
6. Step 6: Final answer
   x = 4,814,581.60