Finding the Fourth Proportional to 23,172.88, 31,977.31 and 13,100.73

Step by Step Solution

1. Step 1: Write the proportion equation
   23,172.88 : 31,977.31 = 13,100.73 : x
2. Step 2: Convert to fraction form
   23,172.88/31,977.31 = 13,100.73/x
3. Step 3: Cross multiply
   23,172.88x = 31,977.31 × 13,100.73
4. Step 4: Simplify right side
   23,172.88x = 418,926,104.44
5. Step 5: Solve for x
   x = 418,926,104.44/23,172.88
6. Step 6: Final answer
   x = 18,078.29