Finding the Third Proportional to 2,140,397.50 and 3,139,640

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140,397.50 : 3,139,640 = 3,139,640 : x
2. Step 2: Convert to fraction form
   2,140,397.50/3,139,640 = 3,139,640/x
3. Step 3: Cross multiply
   2,140,397.50x = 3,139,640 × 3,139,640
4. Step 4: Simplify right side
   2,140,397.50x = 9,857,339,329,600
5. Step 5: Solve for x
   x = 9,857,339,329,600/2,140,397.50
6. Step 6: Final answer
   x = 4,605,377.89