Finding the Third Proportional to 3,571,648 and 5,390,686

Step by Step Solution

1. Step 1: Write the proportion equation
   3,571,648 : 5,390,686 = 5,390,686 : x
2. Step 2: Convert to fraction form
   3,571,648/5,390,686 = 5,390,686/x
3. Step 3: Cross multiply
   3,571,648x = 5,390,686 × 5,390,686
4. Step 4: Simplify right side
   3,571,648x = 29,059,495,550,596
5. Step 5: Solve for x
   x = 29,059,495,550,596/3,571,648
6. Step 6: Final answer
   x = 8,136,158.87