Finding the Third Proportional to 999,488 and 2,185,378

Step by Step Solution

1. Step 1: Write the proportion equation
   999,488 : 2,185,378 = 2,185,378 : x
2. Step 2: Convert to fraction form
   999,488/2,185,378 = 2,185,378/x
3. Step 3: Cross multiply
   999,488x = 2,185,378 × 2,185,378
4. Step 4: Simplify right side
   999,488x = 4,775,877,002,884
5. Step 5: Solve for x
   x = 4,775,877,002,884/999,488
6. Step 6: Final answer
   x = 4,778,323.50