Finding the Fourth Proportional to 17,181.16, 23,757.72 and 13,638.22

Step by Step Solution

1. Step 1: Write the proportion equation
   17,181.16 : 23,757.72 = 13,638.22 : x
2. Step 2: Convert to fraction form
   17,181.16/23,757.72 = 13,638.22/x
3. Step 3: Cross multiply
   17,181.16x = 23,757.72 × 13,638.22
4. Step 4: Simplify right side
   17,181.16x = 324,013,012.06
5. Step 5: Solve for x
   x = 324,013,012.06/17,181.16
6. Step 6: Final answer
   x = 18,858.62