Finding the Third Proportional to 3,686,679 and 5,642,284

Step by Step Solution

1. Step 1: Write the proportion equation
   3,686,679 : 5,642,284 = 5,642,284 : x
2. Step 2: Convert to fraction form
   3,686,679/5,642,284 = 5,642,284/x
3. Step 3: Cross multiply
   3,686,679x = 5,642,284 × 5,642,284
4. Step 4: Simplify right side
   3,686,679x = 31,835,368,736,656
5. Step 5: Solve for x
   x = 31,835,368,736,656/3,686,679
6. Step 6: Final answer
   x = 8,635,242.92