Finding the Third Proportional to 777,010 and 1,200,021

Step by Step Solution

1. Step 1: Write the proportion equation
   777,010 : 1,200,021 = 1,200,021 : x
2. Step 2: Convert to fraction form
   777,010/1,200,021 = 1,200,021/x
3. Step 3: Cross multiply
   777,010x = 1,200,021 × 1,200,021
4. Step 4: Simplify right side
   777,010x = 1,440,050,400,441
5. Step 5: Solve for x
   x = 1,440,050,400,441/777,010
6. Step 6: Final answer
   x = 1,853,322.87