Finding the Fourth Proportional to 13,015.22, 19,509.86 and 5,229.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,015.22 : 19,509.86 = 5,229.50 : x
2. Step 2: Convert to fraction form
   13,015.22/19,509.86 = 5,229.50/x
3. Step 3: Cross multiply
   13,015.22x = 19,509.86 × 5,229.50
4. Step 4: Simplify right side
   13,015.22x = 102,026,728.39
5. Step 5: Solve for x
   x = 102,026,728.39/13,015.22
6. Step 6: Final answer
   x = 7,839.04