Finding the Third Proportional to 1,399,792 and 2,171,620

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,792 : 2,171,620 = 2,171,620 : x
2. Step 2: Convert to fraction form
   1,399,792/2,171,620 = 2,171,620/x
3. Step 3: Cross multiply
   1,399,792x = 2,171,620 × 2,171,620
4. Step 4: Simplify right side
   1,399,792x = 4,715,933,424,400
5. Step 5: Solve for x
   x = 4,715,933,424,400/1,399,792
6. Step 6: Final answer
   x = 3,369,024.42