Finding the Third Proportional to 986,404 and 2,155,448

Step by Step Solution

1. Step 1: Write the proportion equation
   986,404 : 2,155,448 = 2,155,448 : x
2. Step 2: Convert to fraction form
   986,404/2,155,448 = 2,155,448/x
3. Step 3: Cross multiply
   986,404x = 2,155,448 × 2,155,448
4. Step 4: Simplify right side
   986,404x = 4,645,956,080,704
5. Step 5: Solve for x
   x = 4,645,956,080,704/986,404
6. Step 6: Final answer
   x = 4,709,993.15