Finding the Third Proportional to 1,225,990 and 1,913,506

Step by Step Solution

1. Step 1: Write the proportion equation
   1,225,990 : 1,913,506 = 1,913,506 : x
2. Step 2: Convert to fraction form
   1,225,990/1,913,506 = 1,913,506/x
3. Step 3: Cross multiply
   1,225,990x = 1,913,506 × 1,913,506
4. Step 4: Simplify right side
   1,225,990x = 3,661,505,212,036
5. Step 5: Solve for x
   x = 3,661,505,212,036/1,225,990
6. Step 6: Final answer
   x = 2,986,570.21