Finding the Fourth Proportional to 21,280.36, 31,920.06 and 5,697.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,280.36 : 31,920.06 = 5,697.98 : x
2. Step 2: Convert to fraction form
   21,280.36/31,920.06 = 5,697.98/x
3. Step 3: Cross multiply
   21,280.36x = 31,920.06 × 5,697.98
4. Step 4: Simplify right side
   21,280.36x = 181,879,863.48
5. Step 5: Solve for x
   x = 181,879,863.48/21,280.36
6. Step 6: Final answer
   x = 8,546.84