Finding the Fourth Proportional to 23,167.58, 31,971.26 and 12,557.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,167.58 : 31,971.26 = 12,557.21 : x
2. Step 2: Convert to fraction form
   23,167.58/31,971.26 = 12,557.21/x
3. Step 3: Cross multiply
   23,167.58x = 31,971.26 × 12,557.21
4. Step 4: Simplify right side
   23,167.58x = 401,469,697.32
5. Step 5: Solve for x
   x = 401,469,697.32/23,167.58
6. Step 6: Final answer
   x = 17,328.95