Finding the Third Proportional to 7,810.50 and 11,131.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,810.50 : 11,131.31 = 11,131.31 : x
2. Step 2: Convert to fraction form
   7,810.50/11,131.31 = 11,131.31/x
3. Step 3: Cross multiply
   7,810.50x = 11,131.31 × 11,131.31
4. Step 4: Simplify right side
   7,810.50x = 123,906,117.97
5. Step 5: Solve for x
   x = 123,906,117.97/7,810.50
6. Step 6: Final answer
   x = 15,864.04