Finding the Third Proportional to 772,368 and 1,615,320

Step by Step Solution

1. Step 1: Write the proportion equation
   772,368 : 1,615,320 = 1,615,320 : x
2. Step 2: Convert to fraction form
   772,368/1,615,320 = 1,615,320/x
3. Step 3: Cross multiply
   772,368x = 1,615,320 × 1,615,320
4. Step 4: Simplify right side
   772,368x = 2,609,258,702,400
5. Step 5: Solve for x
   x = 2,609,258,702,400/772,368
6. Step 6: Final answer
   x = 3,378,258.42