Finding the Fourth Proportional to 23,156.40, 31,955.24 and 13,085.88

Step by Step Solution

1. Step 1: Write the proportion equation
   23,156.40 : 31,955.24 = 13,085.88 : x
2. Step 2: Convert to fraction form
   23,156.40/31,955.24 = 13,085.88/x
3. Step 3: Cross multiply
   23,156.40x = 31,955.24 × 13,085.88
4. Step 4: Simplify right side
   23,156.40x = 418,162,436.01
5. Step 5: Solve for x
   x = 418,162,436.01/23,156.40
6. Step 6: Final answer
   x = 18,058.18