Finding the Third Proportional to 1,220,172 and 1,855,136

Step by Step Solution

1. Step 1: Write the proportion equation
   1,220,172 : 1,855,136 = 1,855,136 : x
2. Step 2: Convert to fraction form
   1,220,172/1,855,136 = 1,855,136/x
3. Step 3: Cross multiply
   1,220,172x = 1,855,136 × 1,855,136
4. Step 4: Simplify right side
   1,220,172x = 3,441,529,578,496
5. Step 5: Solve for x
   x = 3,441,529,578,496/1,220,172
6. Step 6: Final answer
   x = 2,820,528.24