Finding the Third Proportional to 2,172,378 and 4,772,976

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172,378 : 4,772,976 = 4,772,976 : x
2. Step 2: Convert to fraction form
   2,172,378/4,772,976 = 4,772,976/x
3. Step 3: Cross multiply
   2,172,378x = 4,772,976 × 4,772,976
4. Step 4: Simplify right side
   2,172,378x = 22,781,299,896,576
5. Step 5: Solve for x
   x = 22,781,299,896,576/2,172,378
6. Step 6: Final answer
   x = 10,486,802.89