Finding the Third Proportional to 1,399,045 and 2,160,396

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,045 : 2,160,396 = 2,160,396 : x
2. Step 2: Convert to fraction form
   1,399,045/2,160,396 = 2,160,396/x
3. Step 3: Cross multiply
   1,399,045x = 2,160,396 × 2,160,396
4. Step 4: Simplify right side
   1,399,045x = 4,667,310,876,816
5. Step 5: Solve for x
   x = 4,667,310,876,816/1,399,045
6. Step 6: Final answer
   x = 3,336,069.16