Finding the Third Proportional to 1,286,456 and 1,891,136

Step by Step Solution

1. Step 1: Write the proportion equation
   1,286,456 : 1,891,136 = 1,891,136 : x
2. Step 2: Convert to fraction form
   1,286,456/1,891,136 = 1,891,136/x
3. Step 3: Cross multiply
   1,286,456x = 1,891,136 × 1,891,136
4. Step 4: Simplify right side
   1,286,456x = 3,576,395,370,496
5. Step 5: Solve for x
   x = 3,576,395,370,496/1,286,456
6. Step 6: Final answer
   x = 2,780,037.07