Finding the Third Proportional to 861,870 and 1,388,702

Step by Step Solution

1. Step 1: Write the proportion equation
   861,870 : 1,388,702 = 1,388,702 : x
2. Step 2: Convert to fraction form
   861,870/1,388,702 = 1,388,702/x
3. Step 3: Cross multiply
   861,870x = 1,388,702 × 1,388,702
4. Step 4: Simplify right side
   861,870x = 1,928,493,244,804
5. Step 5: Solve for x
   x = 1,928,493,244,804/861,870
6. Step 6: Final answer
   x = 2,237,568.59