Finding the Third Proportional to 1,388,981 and 2,087,169

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,981 : 2,087,169 = 2,087,169 : x
2. Step 2: Convert to fraction form
   1,388,981/2,087,169 = 2,087,169/x
3. Step 3: Cross multiply
   1,388,981x = 2,087,169 × 2,087,169
4. Step 4: Simplify right side
   1,388,981x = 4,356,274,434,561
5. Step 5: Solve for x
   x = 4,356,274,434,561/1,388,981
6. Step 6: Final answer
   x = 3,136,309.59