Finding the Third Proportional to 772,384 and 1,615,390

Step by Step Solution

1. Step 1: Write the proportion equation
   772,384 : 1,615,390 = 1,615,390 : x
2. Step 2: Convert to fraction form
   772,384/1,615,390 = 1,615,390/x
3. Step 3: Cross multiply
   772,384x = 1,615,390 × 1,615,390
4. Step 4: Simplify right side
   772,384x = 2,609,484,852,100
5. Step 5: Solve for x
   x = 2,609,484,852,100/772,384
6. Step 6: Final answer
   x = 3,378,481.24