Finding the Fourth Proportional to 23,171.58, 31,976.73 and 12,561.30

Step by Step Solution

1. Step 1: Write the proportion equation
   23,171.58 : 31,976.73 = 12,561.30 : x
2. Step 2: Convert to fraction form
   23,171.58/31,976.73 = 12,561.30/x
3. Step 3: Cross multiply
   23,171.58x = 31,976.73 × 12,561.30
4. Step 4: Simplify right side
   23,171.58x = 401,669,298.55
5. Step 5: Solve for x
   x = 401,669,298.55/23,171.58
6. Step 6: Final answer
   x = 17,334.57