Finding the Third Proportional to 1,391,289 and 3,221,074.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391,289 : 3,221,074.50 = 3,221,074.50 : x
2. Step 2: Convert to fraction form
   1,391,289/3,221,074.50 = 3,221,074.50/x
3. Step 3: Cross multiply
   1,391,289x = 3,221,074.50 × 3,221,074.50
4. Step 4: Simplify right side
   1,391,289x = 10,375,320,934,550.25
5. Step 5: Solve for x
   x = 10,375,320,934,550.25/1,391,289
6. Step 6: Final answer
   x = 7,457,344.19