Finding the Fourth Proportional to 13,019.16, 19,531.42 and 5,228.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.16 : 19,531.42 = 5,228.58 : x
2. Step 2: Convert to fraction form
   13,019.16/19,531.42 = 5,228.58/x
3. Step 3: Cross multiply
   13,019.16x = 19,531.42 × 5,228.58
4. Step 4: Simplify right side
   13,019.16x = 102,121,591.98
5. Step 5: Solve for x
   x = 102,121,591.98/13,019.16
6. Step 6: Final answer
   x = 7,843.95