Finding the Third Proportional to 3,657.94 and 8,631.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,657.94 : 8,631.56 = 8,631.56 : x
2. Step 2: Convert to fraction form
   3,657.94/8,631.56 = 8,631.56/x
3. Step 3: Cross multiply
   3,657.94x = 8,631.56 × 8,631.56
4. Step 4: Simplify right side
   3,657.94x = 74,503,871.19
5. Step 5: Solve for x
   x = 74,503,871.19/3,657.94
6. Step 6: Final answer
   x = 20,367.73