Finding the Third Proportional to 1,216,136 and 1,891,569

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,136 : 1,891,569 = 1,891,569 : x
2. Step 2: Convert to fraction form
   1,216,136/1,891,569 = 1,891,569/x
3. Step 3: Cross multiply
   1,216,136x = 1,891,569 × 1,891,569
4. Step 4: Simplify right side
   1,216,136x = 3,578,033,281,761
5. Step 5: Solve for x
   x = 3,578,033,281,761/1,216,136
6. Step 6: Final answer
   x = 2,942,132.53