Finding the Third Proportional to 1,257,640 and 1,777,820

Step by Step Solution

1. Step 1: Write the proportion equation
   1,257,640 : 1,777,820 = 1,777,820 : x
2. Step 2: Convert to fraction form
   1,257,640/1,777,820 = 1,777,820/x
3. Step 3: Cross multiply
   1,257,640x = 1,777,820 × 1,777,820
4. Step 4: Simplify right side
   1,257,640x = 3,160,643,952,400
5. Step 5: Solve for x
   x = 3,160,643,952,400/1,257,640
6. Step 6: Final answer
   x = 2,513,154.76