Finding the Third Proportional to 3,958.88 and 8,543.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.88 : 8,543.81 = 8,543.81 : x
2. Step 2: Convert to fraction form
   3,958.88/8,543.81 = 8,543.81/x
3. Step 3: Cross multiply
   3,958.88x = 8,543.81 × 8,543.81
4. Step 4: Simplify right side
   3,958.88x = 72,996,732.04
5. Step 5: Solve for x
   x = 72,996,732.04/3,958.88
6. Step 6: Final answer
   x = 18,438.76