Finding the Third Proportional to 3,861 and 8,468.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861 : 8,468.72 = 8,468.72 : x
2. Step 2: Convert to fraction form
   3,861/8,468.72 = 8,468.72/x
3. Step 3: Cross multiply
   3,861x = 8,468.72 × 8,468.72
4. Step 4: Simplify right side
   3,861x = 71,719,197.27
5. Step 5: Solve for x
   x = 71,719,197.27/3,861
6. Step 6: Final answer
   x = 18,575.29