Finding the Fourth Proportional to 20,071.19, 30,108.51 and 5,280.19

Step by Step Solution

1. Step 1: Write the proportion equation
   20,071.19 : 30,108.51 = 5,280.19 : x
2. Step 2: Convert to fraction form
   20,071.19/30,108.51 = 5,280.19/x
3. Step 3: Cross multiply
   20,071.19x = 30,108.51 × 5,280.19
4. Step 4: Simplify right side
   20,071.19x = 158,978,578.15
5. Step 5: Solve for x
   x = 158,978,578.15/20,071.19
6. Step 6: Final answer
   x = 7,920.73