Finding the Fourth Proportional to 13,071.99, 19,610.42 and 5,286.27

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.99 : 19,610.42 = 5,286.27 : x
2. Step 2: Convert to fraction form
   13,071.99/19,610.42 = 5,286.27/x
3. Step 3: Cross multiply
   13,071.99x = 19,610.42 × 5,286.27
4. Step 4: Simplify right side
   13,071.99x = 103,665,948.50
5. Step 5: Solve for x
   x = 103,665,948.50/13,071.99
6. Step 6: Final answer
   x = 7,930.39