Finding the Third Proportional to 1,399,776 and 2,171,600

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,776 : 2,171,600 = 2,171,600 : x
2. Step 2: Convert to fraction form
   1,399,776/2,171,600 = 2,171,600/x
3. Step 3: Cross multiply
   1,399,776x = 2,171,600 × 2,171,600
4. Step 4: Simplify right side
   1,399,776x = 4,715,846,560,000
5. Step 5: Solve for x
   x = 4,715,846,560,000/1,399,776
6. Step 6: Final answer
   x = 3,369,000.87