Finding the Fourth Proportional to 14,128.35, 21,191.49 and 5,806.11

Step by Step Solution

1. Step 1: Write the proportion equation
   14,128.35 : 21,191.49 = 5,806.11 : x
2. Step 2: Convert to fraction form
   14,128.35/21,191.49 = 5,806.11/x
3. Step 3: Cross multiply
   14,128.35x = 21,191.49 × 5,806.11
4. Step 4: Simplify right side
   14,128.35x = 123,040,122.00
5. Step 5: Solve for x
   x = 123,040,122.00/14,128.35
6. Step 6: Final answer
   x = 8,708.74