Finding the Third Proportional to 3,951.70 and 8,631.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,951.70 : 8,631.98 = 8,631.98 : x
2. Step 2: Convert to fraction form
   3,951.70/8,631.98 = 8,631.98/x
3. Step 3: Cross multiply
   3,951.70x = 8,631.98 × 8,631.98
4. Step 4: Simplify right side
   3,951.70x = 74,511,154.25
5. Step 5: Solve for x
   x = 74,511,154.25/3,951.70
6. Step 6: Final answer
   x = 18,855.45