Finding the Fourth Proportional to 21,139.07, 31,708.49 and 5,344.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,139.07 : 31,708.49 = 5,344.09 : x
2. Step 2: Convert to fraction form
   21,139.07/31,708.49 = 5,344.09/x
3. Step 3: Cross multiply
   21,139.07x = 31,708.49 × 5,344.09
4. Step 4: Simplify right side
   21,139.07x = 169,453,111.72
5. Step 5: Solve for x
   x = 169,453,111.72/21,139.07
6. Step 6: Final answer
   x = 8,016.11