Finding the Third Proportional to 1,388,994 and 2,087,187

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,994 : 2,087,187 = 2,087,187 : x
2. Step 2: Convert to fraction form
   1,388,994/2,087,187 = 2,087,187/x
3. Step 3: Cross multiply
   1,388,994x = 2,087,187 × 2,087,187
4. Step 4: Simplify right side
   1,388,994x = 4,356,349,572,969
5. Step 5: Solve for x
   x = 4,356,349,572,969/1,388,994
6. Step 6: Final answer
   x = 3,136,334.33