Finding the Third Proportional to 1,266,690 and 2,656,260

Step by Step Solution

1. Step 1: Write the proportion equation
   1,266,690 : 2,656,260 = 2,656,260 : x
2. Step 2: Convert to fraction form
   1,266,690/2,656,260 = 2,656,260/x
3. Step 3: Cross multiply
   1,266,690x = 2,656,260 × 2,656,260
4. Step 4: Simplify right side
   1,266,690x = 7,055,717,187,600
5. Step 5: Solve for x
   x = 7,055,717,187,600/1,266,690
6. Step 6: Final answer
   x = 5,570,200.43