Finding the Third Proportional to 11,991 and 17,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,991 : 17,863.50 = 17,863.50 : x
2. Step 2: Convert to fraction form
   11,991/17,863.50 = 17,863.50/x
3. Step 3: Cross multiply
   11,991x = 17,863.50 × 17,863.50
4. Step 4: Simplify right side
   11,991x = 319,104,632.25
5. Step 5: Solve for x
   x = 319,104,632.25/11,991
6. Step 6: Final answer
   x = 26,612.01