Finding the Third Proportional to 772,388 and 1,615,398

Step by Step Solution

1. Step 1: Write the proportion equation
   772,388 : 1,615,398 = 1,615,398 : x
2. Step 2: Convert to fraction form
   772,388/1,615,398 = 1,615,398/x
3. Step 3: Cross multiply
   772,388x = 1,615,398 × 1,615,398
4. Step 4: Simplify right side
   772,388x = 2,609,510,698,404
5. Step 5: Solve for x
   x = 2,609,510,698,404/772,388
6. Step 6: Final answer
   x = 3,378,497.20