Finding the Third Proportional to 2,665,686 and 5,756,128

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665,686 : 5,756,128 = 5,756,128 : x
2. Step 2: Convert to fraction form
   2,665,686/5,756,128 = 5,756,128/x
3. Step 3: Cross multiply
   2,665,686x = 5,756,128 × 5,756,128
4. Step 4: Simplify right side
   2,665,686x = 33,133,009,552,384
5. Step 5: Solve for x
   x = 33,133,009,552,384/2,665,686
6. Step 6: Final answer
   x = 12,429,449.51