Finding the Third Proportional to 2,143,378 and 4,623,280

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,378 : 4,623,280 = 4,623,280 : x
2. Step 2: Convert to fraction form
   2,143,378/4,623,280 = 4,623,280/x
3. Step 3: Cross multiply
   2,143,378x = 4,623,280 × 4,623,280
4. Step 4: Simplify right side
   2,143,378x = 21,374,717,958,400
5. Step 5: Solve for x
   x = 21,374,717,958,400/2,143,378
6. Step 6: Final answer
   x = 9,972,444.41