Finding the Fourth Proportional to 13,019.49, 19,530.15 and 5,228.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.49 : 19,530.15 = 5,228.30 : x
2. Step 2: Convert to fraction form
   13,019.49/19,530.15 = 5,228.30/x
3. Step 3: Cross multiply
   13,019.49x = 19,530.15 × 5,228.30
4. Step 4: Simplify right side
   13,019.49x = 102,109,512.46
5. Step 5: Solve for x
   x = 102,109,512.46/13,019.49
6. Step 6: Final answer
   x = 7,842.82