Finding the Third Proportional to 386,577 and 799,670.25

Step by Step Solution

1. Step 1: Write the proportion equation
   386,577 : 799,670.25 = 799,670.25 : x
2. Step 2: Convert to fraction form
   386,577/799,670.25 = 799,670.25/x
3. Step 3: Cross multiply
   386,577x = 799,670.25 × 799,670.25
4. Step 4: Simplify right side
   386,577x = 639,472,508,735.06
5. Step 5: Solve for x
   x = 639,472,508,735.06/386,577
6. Step 6: Final answer
   x = 1,654,191.81