Finding the Third Proportional to 3,847.50 and 8,479.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,847.50 : 8,479.69 = 8,479.69 : x
2. Step 2: Convert to fraction form
   3,847.50/8,479.69 = 8,479.69/x
3. Step 3: Cross multiply
   3,847.50x = 8,479.69 × 8,479.69
4. Step 4: Simplify right side
   3,847.50x = 71,905,100.10
5. Step 5: Solve for x
   x = 71,905,100.10/3,847.50
6. Step 6: Final answer
   x = 18,688.78