Finding the Third Proportional to 5,381,572 and 8,271,643

Step by Step Solution

1. Step 1: Write the proportion equation
   5,381,572 : 8,271,643 = 8,271,643 : x
2. Step 2: Convert to fraction form
   5,381,572/8,271,643 = 8,271,643/x
3. Step 3: Cross multiply
   5,381,572x = 8,271,643 × 8,271,643
4. Step 4: Simplify right side
   5,381,572x = 68,420,077,919,449
5. Step 5: Solve for x
   x = 68,420,077,919,449/5,381,572
6. Step 6: Final answer
   x = 12,713,771.72