Finding the Third Proportional to 3,753.42 and 8,688.23

Step by Step Solution

1. Step 1: Write the proportion equation
   3,753.42 : 8,688.23 = 8,688.23 : x
2. Step 2: Convert to fraction form
   3,753.42/8,688.23 = 8,688.23/x
3. Step 3: Cross multiply
   3,753.42x = 8,688.23 × 8,688.23
4. Step 4: Simplify right side
   3,753.42x = 75,485,416.55
5. Step 5: Solve for x
   x = 75,485,416.55/3,753.42
6. Step 6: Final answer
   x = 20,111.09