Finding the Third Proportional to 2,100,608 and 4,581,440

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100,608 : 4,581,440 = 4,581,440 : x
2. Step 2: Convert to fraction form
   2,100,608/4,581,440 = 4,581,440/x
3. Step 3: Cross multiply
   2,100,608x = 4,581,440 × 4,581,440
4. Step 4: Simplify right side
   2,100,608x = 20,989,592,473,600
5. Step 5: Solve for x
   x = 20,989,592,473,600/2,100,608
6. Step 6: Final answer
   x = 9,992,151.07