Finding the Fourth Proportional to 13,719.38, 18,932.88 and 7,431.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,719.38 : 18,932.88 = 7,431.89 : x
2. Step 2: Convert to fraction form
   13,719.38/18,932.88 = 7,431.89/x
3. Step 3: Cross multiply
   13,719.38x = 18,932.88 × 7,431.89
4. Step 4: Simplify right side
   13,719.38x = 140,707,081.54
5. Step 5: Solve for x
   x = 140,707,081.54/13,719.38
6. Step 6: Final answer
   x = 10,256.08