Finding the Fourth Proportional to 23,154.42, 31,947.57 and 13,721.34

Step by Step Solution

1. Step 1: Write the proportion equation
   23,154.42 : 31,947.57 = 13,721.34 : x
2. Step 2: Convert to fraction form
   23,154.42/31,947.57 = 13,721.34/x
3. Step 3: Cross multiply
   23,154.42x = 31,947.57 × 13,721.34
4. Step 4: Simplify right side
   23,154.42x = 438,363,470.14
5. Step 5: Solve for x
   x = 438,363,470.14/23,154.42
6. Step 6: Final answer
   x = 18,932.17