Finding the Fourth Proportional to 13,071.24, 19,614.90 and 5,172.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,071.24 : 19,614.90 = 5,172.42 : x
2. Step 2: Convert to fraction form
   13,071.24/19,614.90 = 5,172.42/x
3. Step 3: Cross multiply
   13,071.24x = 19,614.90 × 5,172.42
4. Step 4: Simplify right side
   13,071.24x = 101,456,501.06
5. Step 5: Solve for x
   x = 101,456,501.06/13,071.24
6. Step 6: Final answer
   x = 7,761.81