Finding the Fourth Proportional to 23,186.56, 31,990.08 and 13,113.76

Step by Step Solution

1. Step 1: Write the proportion equation
   23,186.56 : 31,990.08 = 13,113.76 : x
2. Step 2: Convert to fraction form
   23,186.56/31,990.08 = 13,113.76/x
3. Step 3: Cross multiply
   23,186.56x = 31,990.08 × 13,113.76
4. Step 4: Simplify right side
   23,186.56x = 419,510,231.50
5. Step 5: Solve for x
   x = 419,510,231.50/23,186.56
6. Step 6: Final answer
   x = 18,092.82