Finding the Third Proportional to 11,806.50 and 18,427.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,806.50 : 18,427.88 = 18,427.88 : x
2. Step 2: Convert to fraction form
   11,806.50/18,427.88 = 18,427.88/x
3. Step 3: Cross multiply
   11,806.50x = 18,427.88 × 18,427.88
4. Step 4: Simplify right side
   11,806.50x = 339,586,577.02
5. Step 5: Solve for x
   x = 339,586,577.02/11,806.50
6. Step 6: Final answer
   x = 28,762.68