Finding the Third Proportional to 5,005.50 and 7,791.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,005.50 : 7,791.75 = 7,791.75 : x
2. Step 2: Convert to fraction form
   5,005.50/7,791.75 = 7,791.75/x
3. Step 3: Cross multiply
   5,005.50x = 7,791.75 × 7,791.75
4. Step 4: Simplify right side
   5,005.50x = 60,711,368.06
5. Step 5: Solve for x
   x = 60,711,368.06/5,005.50
6. Step 6: Final answer
   x = 12,128.93