Finding the Third Proportional to 2,139,197 and 3,209,257.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,197 : 3,209,257.50 = 3,209,257.50 : x
2. Step 2: Convert to fraction form
   2,139,197/3,209,257.50 = 3,209,257.50/x
3. Step 3: Cross multiply
   2,139,197x = 3,209,257.50 × 3,209,257.50
4. Step 4: Simplify right side
   2,139,197x = 10,299,333,701,306.25
5. Step 5: Solve for x
   x = 10,299,333,701,306.25/2,139,197
6. Step 6: Final answer
   x = 4,814,579.35