Finding the Third Proportional to 386,005.50 and 850,540.50

Step by Step Solution

1. Step 1: Write the proportion equation
   386,005.50 : 850,540.50 = 850,540.50 : x
2. Step 2: Convert to fraction form
   386,005.50/850,540.50 = 850,540.50/x
3. Step 3: Cross multiply
   386,005.50x = 850,540.50 × 850,540.50
4. Step 4: Simplify right side
   386,005.50x = 723,419,142,140.25
5. Step 5: Solve for x
   x = 723,419,142,140.25/386,005.50
6. Step 6: Final answer
   x = 1,874,116.15