Finding the Third Proportional to 7,879.50 and 12,071.25

Step by Step Solution

1. Step 1: Write the proportion equation
   7,879.50 : 12,071.25 = 12,071.25 : x
2. Step 2: Convert to fraction form
   7,879.50/12,071.25 = 12,071.25/x
3. Step 3: Cross multiply
   7,879.50x = 12,071.25 × 12,071.25
4. Step 4: Simplify right side
   7,879.50x = 145,715,076.56
5. Step 5: Solve for x
   x = 145,715,076.56/7,879.50
6. Step 6: Final answer
   x = 18,492.93