Finding the Third Proportional to 1,012,440 and 2,138,718

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012,440 : 2,138,718 = 2,138,718 : x
2. Step 2: Convert to fraction form
   1,012,440/2,138,718 = 2,138,718/x
3. Step 3: Cross multiply
   1,012,440x = 2,138,718 × 2,138,718
4. Step 4: Simplify right side
   1,012,440x = 4,574,114,683,524
5. Step 5: Solve for x
   x = 4,574,114,683,524/1,012,440
6. Step 6: Final answer
   x = 4,517,911.86