Finding the Third Proportional to 3,555,686 and 5,648,457

Step by Step Solution

1. Step 1: Write the proportion equation
   3,555,686 : 5,648,457 = 5,648,457 : x
2. Step 2: Convert to fraction form
   3,555,686/5,648,457 = 5,648,457/x
3. Step 3: Cross multiply
   3,555,686x = 5,648,457 × 5,648,457
4. Step 4: Simplify right side
   3,555,686x = 31,905,066,480,849
5. Step 5: Solve for x
   x = 31,905,066,480,849/3,555,686
6. Step 6: Final answer
   x = 8,972,970.75