Finding the Third Proportional to 1,397,345 and 1,977,642

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397,345 : 1,977,642 = 1,977,642 : x
2. Step 2: Convert to fraction form
   1,397,345/1,977,642 = 1,977,642/x
3. Step 3: Cross multiply
   1,397,345x = 1,977,642 × 1,977,642
4. Step 4: Simplify right side
   1,397,345x = 3,911,067,880,164
5. Step 5: Solve for x
   x = 3,911,067,880,164/1,397,345
6. Step 6: Final answer
   x = 2,798,927.88