Finding the Third Proportional to 870,971 and 1,368,665

Step by Step Solution

1. Step 1: Write the proportion equation
   870,971 : 1,368,665 = 1,368,665 : x
2. Step 2: Convert to fraction form
   870,971/1,368,665 = 1,368,665/x
3. Step 3: Cross multiply
   870,971x = 1,368,665 × 1,368,665
4. Step 4: Simplify right side
   870,971x = 1,873,243,882,225
5. Step 5: Solve for x
   x = 1,873,243,882,225/870,971
6. Step 6: Final answer
   x = 2,150,753.45