Finding the Third Proportional to 11,811 and 17,806.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,811 : 17,806.50 = 17,806.50 : x
2. Step 2: Convert to fraction form
   11,811/17,806.50 = 17,806.50/x
3. Step 3: Cross multiply
   11,811x = 17,806.50 × 17,806.50
4. Step 4: Simplify right side
   11,811x = 317,071,442.25
5. Step 5: Solve for x
   x = 317,071,442.25/11,811
6. Step 6: Final answer
   x = 26,845.44