Finding the Fourth Proportional to 13,131.16, 19,696.32 and 5,339.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.16 : 19,696.32 = 5,339.80 : x
2. Step 2: Convert to fraction form
   13,131.16/19,696.32 = 5,339.80/x
3. Step 3: Cross multiply
   13,131.16x = 19,696.32 × 5,339.80
4. Step 4: Simplify right side
   13,131.16x = 105,174,409.54
5. Step 5: Solve for x
   x = 105,174,409.54/13,131.16
6. Step 6: Final answer
   x = 8,009.53