Finding the Fourth Proportional to 13,147.82, 19,721.64 and 3,287.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.82 : 19,721.64 = 3,287.04 : x
2. Step 2: Convert to fraction form
   13,147.82/19,721.64 = 3,287.04/x
3. Step 3: Cross multiply
   13,147.82x = 19,721.64 × 3,287.04
4. Step 4: Simplify right side
   13,147.82x = 64,825,819.55
5. Step 5: Solve for x
   x = 64,825,819.55/13,147.82
6. Step 6: Final answer
   x = 4,930.54