Finding the Third Proportional to 1,005,388 and 2,187,680

Step by Step Solution

1. Step 1: Write the proportion equation
   1,005,388 : 2,187,680 = 2,187,680 : x
2. Step 2: Convert to fraction form
   1,005,388/2,187,680 = 2,187,680/x
3. Step 3: Cross multiply
   1,005,388x = 2,187,680 × 2,187,680
4. Step 4: Simplify right side
   1,005,388x = 4,785,943,782,400
5. Step 5: Solve for x
   x = 4,785,943,782,400/1,005,388
6. Step 6: Final answer
   x = 4,760,295.31