Finding the Fourth Proportional to 23,119.21, 31,902.18 and 13,047.05

Step by Step Solution

1. Step 1: Write the proportion equation
   23,119.21 : 31,902.18 = 13,047.05 : x
2. Step 2: Convert to fraction form
   23,119.21/31,902.18 = 13,047.05/x
3. Step 3: Cross multiply
   23,119.21x = 31,902.18 × 13,047.05
4. Step 4: Simplify right side
   23,119.21x = 416,229,315.37
5. Step 5: Solve for x
   x = 416,229,315.37/23,119.21
6. Step 6: Final answer
   x = 18,003.62