Finding the Fourth Proportional to 20,117.91, 30,174.03 and 5,328.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,117.91 : 30,174.03 = 5,328.12 : x
2. Step 2: Convert to fraction form
   20,117.91/30,174.03 = 5,328.12/x
3. Step 3: Cross multiply
   20,117.91x = 30,174.03 × 5,328.12
4. Step 4: Simplify right side
   20,117.91x = 160,770,852.72
5. Step 5: Solve for x
   x = 160,770,852.72/20,117.91
6. Step 6: Final answer
   x = 7,991.43