Finding the Third Proportional to 1,121,000 and 1,707,420

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121,000 : 1,707,420 = 1,707,420 : x
2. Step 2: Convert to fraction form
   1,121,000/1,707,420 = 1,707,420/x
3. Step 3: Cross multiply
   1,121,000x = 1,707,420 × 1,707,420
4. Step 4: Simplify right side
   1,121,000x = 2,915,283,056,400
5. Step 5: Solve for x
   x = 2,915,283,056,400/1,121,000
6. Step 6: Final answer
   x = 2,600,609.33