Finding the Third Proportional to 986,415 and 2,155,470

Step by Step Solution

1. Step 1: Write the proportion equation
   986,415 : 2,155,470 = 2,155,470 : x
2. Step 2: Convert to fraction form
   986,415/2,155,470 = 2,155,470/x
3. Step 3: Cross multiply
   986,415x = 2,155,470 × 2,155,470
4. Step 4: Simplify right side
   986,415x = 4,646,050,920,900
5. Step 5: Solve for x
   x = 4,646,050,920,900/986,415
6. Step 6: Final answer
   x = 4,710,036.77