Finding the Third Proportional to 7,078.50 and 10,915

Step by Step Solution

1. Step 1: Write the proportion equation
   7,078.50 : 10,915 = 10,915 : x
2. Step 2: Convert to fraction form
   7,078.50/10,915 = 10,915/x
3. Step 3: Cross multiply
   7,078.50x = 10,915 × 10,915
4. Step 4: Simplify right side
   7,078.50x = 119,137,225
5. Step 5: Solve for x
   x = 119,137,225/7,078.50
6. Step 6: Final answer
   x = 16,830.86