Finding the Third Proportional to 3,889.81 and 8,535.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,889.81 : 8,535.50 = 8,535.50 : x
2. Step 2: Convert to fraction form
   3,889.81/8,535.50 = 8,535.50/x
3. Step 3: Cross multiply
   3,889.81x = 8,535.50 × 8,535.50
4. Step 4: Simplify right side
   3,889.81x = 72,854,760.25
5. Step 5: Solve for x
   x = 72,854,760.25/3,889.81
6. Step 6: Final answer
   x = 18,729.63