Finding the Fourth Proportional to 23,156.96, 31,958.32 and 13,086.56

Step by Step Solution

1. Step 1: Write the proportion equation
   23,156.96 : 31,958.32 = 13,086.56 : x
2. Step 2: Convert to fraction form
   23,156.96/31,958.32 = 13,086.56/x
3. Step 3: Cross multiply
   23,156.96x = 31,958.32 × 13,086.56
4. Step 4: Simplify right side
   23,156.96x = 418,224,472.18
5. Step 5: Solve for x
   x = 418,224,472.18/23,156.96
6. Step 6: Final answer
   x = 18,060.42