Finding the Third Proportional to 2,143,380 and 4,623,284

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143,380 : 4,623,284 = 4,623,284 : x
2. Step 2: Convert to fraction form
   2,143,380/4,623,284 = 4,623,284/x
3. Step 3: Cross multiply
   2,143,380x = 4,623,284 × 4,623,284
4. Step 4: Simplify right side
   2,143,380x = 21,374,754,944,656
5. Step 5: Solve for x
   x = 21,374,754,944,656/2,143,380
6. Step 6: Final answer
   x = 9,972,452.36