Finding the Third Proportional to 615,448 and 1,279,820

Step by Step Solution

1. Step 1: Write the proportion equation
   615,448 : 1,279,820 = 1,279,820 : x
2. Step 2: Convert to fraction form
   615,448/1,279,820 = 1,279,820/x
3. Step 3: Cross multiply
   615,448x = 1,279,820 × 1,279,820
4. Step 4: Simplify right side
   615,448x = 1,637,939,232,400
5. Step 5: Solve for x
   x = 1,637,939,232,400/615,448
6. Step 6: Final answer
   x = 2,661,377.13