Finding the Fourth Proportional to 13,164.15, 19,747.26 and 4,399.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.15 : 19,747.26 = 4,399.10 : x
2. Step 2: Convert to fraction form
   13,164.15/19,747.26 = 4,399.10/x
3. Step 3: Cross multiply
   13,164.15x = 19,747.26 × 4,399.10
4. Step 4: Simplify right side
   13,164.15x = 86,870,171.47
5. Step 5: Solve for x
   x = 86,870,171.47/13,164.15
6. Step 6: Final answer
   x = 6,599.00