Finding the Fourth Proportional to 13,016.66, 19,516.34 and 5,619.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.66 : 19,516.34 = 5,619.20 : x
2. Step 2: Convert to fraction form
   13,016.66/19,516.34 = 5,619.20/x
3. Step 3: Cross multiply
   13,016.66x = 19,516.34 × 5,619.20
4. Step 4: Simplify right side
   13,016.66x = 109,666,217.73
5. Step 5: Solve for x
   x = 109,666,217.73/13,016.66
6. Step 6: Final answer
   x = 8,425.07