Finding the Third Proportional to 1,388,983 and 2,087,172

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,983 : 2,087,172 = 2,087,172 : x
2. Step 2: Convert to fraction form
   1,388,983/2,087,172 = 2,087,172/x
3. Step 3: Cross multiply
   1,388,983x = 2,087,172 × 2,087,172
4. Step 4: Simplify right side
   1,388,983x = 4,356,286,957,584
5. Step 5: Solve for x
   x = 4,356,286,957,584/1,388,983
6. Step 6: Final answer
   x = 3,136,314.09