Finding the Third Proportional to 1,392,540 and 1,878,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392,540 : 1,878,840 = 1,878,840 : x
2. Step 2: Convert to fraction form
   1,392,540/1,878,840 = 1,878,840/x
3. Step 3: Cross multiply
   1,392,540x = 1,878,840 × 1,878,840
4. Step 4: Simplify right side
   1,392,540x = 3,530,039,745,600
5. Step 5: Solve for x
   x = 3,530,039,745,600/1,392,540
6. Step 6: Final answer
   x = 2,534,964.70