Finding the Third Proportional to 1,317,128 and 1,986,080

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317,128 : 1,986,080 = 1,986,080 : x
2. Step 2: Convert to fraction form
   1,317,128/1,986,080 = 1,986,080/x
3. Step 3: Cross multiply
   1,317,128x = 1,986,080 × 1,986,080
4. Step 4: Simplify right side
   1,317,128x = 3,944,513,766,400
5. Step 5: Solve for x
   x = 3,944,513,766,400/1,317,128
6. Step 6: Final answer
   x = 2,994,783.93