Finding the Fourth Proportional to 23,167.50, 31,971.15 and 12,557.10

Step by Step Solution

1. Step 1: Write the proportion equation
   23,167.50 : 31,971.15 = 12,557.10 : x
2. Step 2: Convert to fraction form
   23,167.50/31,971.15 = 12,557.10/x
3. Step 3: Cross multiply
   23,167.50x = 31,971.15 × 12,557.10
4. Step 4: Simplify right side
   23,167.50x = 401,464,927.67
5. Step 5: Solve for x
   x = 401,464,927.67/23,167.50
6. Step 6: Final answer
   x = 17,328.80