Finding the Third Proportional to 2,140,396.50 and 3,139,638

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140,396.50 : 3,139,638 = 3,139,638 : x
2. Step 2: Convert to fraction form
   2,140,396.50/3,139,638 = 3,139,638/x
3. Step 3: Cross multiply
   2,140,396.50x = 3,139,638 × 3,139,638
4. Step 4: Simplify right side
   2,140,396.50x = 9,857,326,771,044
5. Step 5: Solve for x
   x = 9,857,326,771,044/2,140,396.50
6. Step 6: Final answer
   x = 4,605,374.18