Finding the Third Proportional to 8,991.33 and 13,611.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,991.33 : 13,611.91 = 13,611.91 : x
2. Step 2: Convert to fraction form
   8,991.33/13,611.91 = 13,611.91/x
3. Step 3: Cross multiply
   8,991.33x = 13,611.91 × 13,611.91
4. Step 4: Simplify right side
   8,991.33x = 185,284,204.44
5. Step 5: Solve for x
   x = 185,284,204.44/8,991.33
6. Step 6: Final answer
   x = 20,606.99