Finding the Fourth Proportional to 13,287.29, 19,930.91 and 3,927.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,287.29 : 19,930.91 = 3,927.42 : x
2. Step 2: Convert to fraction form
   13,287.29/19,930.91 = 3,927.42/x
3. Step 3: Cross multiply
   13,287.29x = 19,930.91 × 3,927.42
4. Step 4: Simplify right side
   13,287.29x = 78,277,034.92
5. Step 5: Solve for x
   x = 78,277,034.92/13,287.29
6. Step 6: Final answer
   x = 5,891.12