Finding the Third Proportional to 649,686 and 999,886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   649,686 : 999,886.50 = 999,886.50 : x
2. Step 2: Convert to fraction form
   649,686/999,886.50 = 999,886.50/x
3. Step 3: Cross multiply
   649,686x = 999,886.50 × 999,886.50
4. Step 4: Simplify right side
   649,686x = 999,773,012,882.25
5. Step 5: Solve for x
   x = 999,773,012,882.25/649,686
6. Step 6: Final answer
   x = 1,538,855.71