Finding the Third Proportional to 615,447 and 1,279,818

Step by Step Solution

1. Step 1: Write the proportion equation
   615,447 : 1,279,818 = 1,279,818 : x
2. Step 2: Convert to fraction form
   615,447/1,279,818 = 1,279,818/x
3. Step 3: Cross multiply
   615,447x = 1,279,818 × 1,279,818
4. Step 4: Simplify right side
   615,447x = 1,637,934,113,124
5. Step 5: Solve for x
   x = 1,637,934,113,124/615,447
6. Step 6: Final answer
   x = 2,661,373.14