Finding the Fourth Proportional to 23,103.42, 31,890.69 and 13,671.51

Step by Step Solution

1. Step 1: Write the proportion equation
   23,103.42 : 31,890.69 = 13,671.51 : x
2. Step 2: Convert to fraction form
   23,103.42/31,890.69 = 13,671.51/x
3. Step 3: Cross multiply
   23,103.42x = 31,890.69 × 13,671.51
4. Step 4: Simplify right side
   23,103.42x = 435,993,887.24
5. Step 5: Solve for x
   x = 435,993,887.24/23,103.42
6. Step 6: Final answer
   x = 18,871.40