Finding the Third Proportional to 3,863.81 and 7,666.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863.81 : 7,666.88 = 7,666.88 : x
2. Step 2: Convert to fraction form
   3,863.81/7,666.88 = 7,666.88/x
3. Step 3: Cross multiply
   3,863.81x = 7,666.88 × 7,666.88
4. Step 4: Simplify right side
   3,863.81x = 58,780,972.27
5. Step 5: Solve for x
   x = 58,780,972.27/3,863.81
6. Step 6: Final answer
   x = 15,213.21