Finding the Third Proportional to 2,128,008 and 4,669,440

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128,008 : 4,669,440 = 4,669,440 : x
2. Step 2: Convert to fraction form
   2,128,008/4,669,440 = 4,669,440/x
3. Step 3: Cross multiply
   2,128,008x = 4,669,440 × 4,669,440
4. Step 4: Simplify right side
   2,128,008x = 21,803,669,913,600
5. Step 5: Solve for x
   x = 21,803,669,913,600/2,128,008
6. Step 6: Final answer
   x = 10,246,046.97