Finding the Fourth Proportional to 13,131.72, 19,698.84 and 5,339.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.72 : 19,698.84 = 5,339.52 : x
2. Step 2: Convert to fraction form
   13,131.72/19,698.84 = 5,339.52/x
3. Step 3: Cross multiply
   13,131.72x = 19,698.84 × 5,339.52
4. Step 4: Simplify right side
   13,131.72x = 105,182,350.16
5. Step 5: Solve for x
   x = 105,182,350.16/13,131.72
6. Step 6: Final answer
   x = 8,009.79