Finding the Third Proportional to 1,445,864 and 2,164,420

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445,864 : 2,164,420 = 2,164,420 : x
2. Step 2: Convert to fraction form
   1,445,864/2,164,420 = 2,164,420/x
3. Step 3: Cross multiply
   1,445,864x = 2,164,420 × 2,164,420
4. Step 4: Simplify right side
   1,445,864x = 4,684,713,936,400
5. Step 5: Solve for x
   x = 4,684,713,936,400/1,445,864
6. Step 6: Final answer
   x = 3,240,079.24