Finding the Third Proportional to 2,615,458 and 5,631,686

Step by Step Solution

1. Step 1: Write the proportion equation
   2,615,458 : 5,631,686 = 5,631,686 : x
2. Step 2: Convert to fraction form
   2,615,458/5,631,686 = 5,631,686/x
3. Step 3: Cross multiply
   2,615,458x = 5,631,686 × 5,631,686
4. Step 4: Simplify right side
   2,615,458x = 31,715,887,202,596
5. Step 5: Solve for x
   x = 31,715,887,202,596/2,615,458
6. Step 6: Final answer
   x = 12,126,322.50