Finding the Third Proportional to 2,581,720 and 5,611,210

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581,720 : 5,611,210 = 5,611,210 : x
2. Step 2: Convert to fraction form
   2,581,720/5,611,210 = 5,611,210/x
3. Step 3: Cross multiply
   2,581,720x = 5,611,210 × 5,611,210
4. Step 4: Simplify right side
   2,581,720x = 31,485,677,664,100
5. Step 5: Solve for x
   x = 31,485,677,664,100/2,581,720
6. Step 6: Final answer
   x = 12,195,620.62