Finding the Third Proportional to 5,381,570 and 8,271,640

Step by Step Solution

1. Step 1: Write the proportion equation
   5,381,570 : 8,271,640 = 8,271,640 : x
2. Step 2: Convert to fraction form
   5,381,570/8,271,640 = 8,271,640/x
3. Step 3: Cross multiply
   5,381,570x = 8,271,640 × 8,271,640
4. Step 4: Simplify right side
   5,381,570x = 68,420,028,289,600
5. Step 5: Solve for x
   x = 68,420,028,289,600/5,381,570
6. Step 6: Final answer
   x = 12,713,767.23