Finding the Fourth Proportional to 13,172.67, 19,764.27 and 5,781.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,172.67 : 19,764.27 = 5,781.42 : x
2. Step 2: Convert to fraction form
   13,172.67/19,764.27 = 5,781.42/x
3. Step 3: Cross multiply
   13,172.67x = 19,764.27 × 5,781.42
4. Step 4: Simplify right side
   13,172.67x = 114,265,545.86
5. Step 5: Solve for x
   x = 114,265,545.86/13,172.67
6. Step 6: Final answer
   x = 8,674.44