Finding the Third Proportional to 999,490 and 2,185,382

Step by Step Solution

1. Step 1: Write the proportion equation
   999,490 : 2,185,382 = 2,185,382 : x
2. Step 2: Convert to fraction form
   999,490/2,185,382 = 2,185,382/x
3. Step 3: Cross multiply
   999,490x = 2,185,382 × 2,185,382
4. Step 4: Simplify right side
   999,490x = 4,775,894,485,924
5. Step 5: Solve for x
   x = 4,775,894,485,924/999,490
6. Step 6: Final answer
   x = 4,778,331.43