Finding the Fourth Proportional to 23,930.16, 33,019.56 and 13,319.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,930.16 : 33,019.56 = 13,319.72 : x
2. Step 2: Convert to fraction form
   23,930.16/33,019.56 = 13,319.72/x
3. Step 3: Cross multiply
   23,930.16x = 33,019.56 × 13,319.72
4. Step 4: Simplify right side
   23,930.16x = 439,811,293.72
5. Step 5: Solve for x
   x = 439,811,293.72/23,930.16
6. Step 6: Final answer
   x = 18,378.95