Finding the Fourth Proportional to 23,148.96, 31,947.28 and 13,078.56

Step by Step Solution

1. Step 1: Write the proportion equation
   23,148.96 : 31,947.28 = 13,078.56 : x
2. Step 2: Convert to fraction form
   23,148.96/31,947.28 = 13,078.56/x
3. Step 3: Cross multiply
   23,148.96x = 31,947.28 × 13,078.56
4. Step 4: Simplify right side
   23,148.96x = 417,824,418.32
5. Step 5: Solve for x
   x = 417,824,418.32/23,148.96
6. Step 6: Final answer
   x = 18,049.38