Finding the Fourth Proportional to 18,499.01, 27,745.38 and 5,172.89

Step by Step Solution

1. Step 1: Write the proportion equation
   18,499.01 : 27,745.38 = 5,172.89 : x
2. Step 2: Convert to fraction form
   18,499.01/27,745.38 = 5,172.89/x
3. Step 3: Cross multiply
   18,499.01x = 27,745.38 × 5,172.89
4. Step 4: Simplify right side
   18,499.01x = 143,523,660.02
5. Step 5: Solve for x
   x = 143,523,660.02/18,499.01
6. Step 6: Final answer
   x = 7,758.45