Finding the Third Proportional to 1,315,440 and 2,734,560

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315,440 : 2,734,560 = 2,734,560 : x
2. Step 2: Convert to fraction form
   1,315,440/2,734,560 = 2,734,560/x
3. Step 3: Cross multiply
   1,315,440x = 2,734,560 × 2,734,560
4. Step 4: Simplify right side
   1,315,440x = 7,477,818,393,600
5. Step 5: Solve for x
   x = 7,477,818,393,600/1,315,440
6. Step 6: Final answer
   x = 5,684,651.82