Finding the Third Proportional to 11,772.21 and 18,145.27

Step by Step Solution

1. Step 1: Write the proportion equation
   11,772.21 : 18,145.27 = 18,145.27 : x
2. Step 2: Convert to fraction form
   11,772.21/18,145.27 = 18,145.27/x
3. Step 3: Cross multiply
   11,772.21x = 18,145.27 × 18,145.27
4. Step 4: Simplify right side
   11,772.21x = 329,250,664.60
5. Step 5: Solve for x
   x = 329,250,664.60/11,772.21
6. Step 6: Final answer
   x = 27,968.46