Finding the Fourth Proportional to 21,301.08, 31,947.22 and 5,715

Step by Step Solution

1. Step 1: Write the proportion equation
   21,301.08 : 31,947.22 = 5,715 : x
2. Step 2: Convert to fraction form
   21,301.08/31,947.22 = 5,715/x
3. Step 3: Cross multiply
   21,301.08x = 31,947.22 × 5,715
4. Step 4: Simplify right side
   21,301.08x = 182,578,362.30
5. Step 5: Solve for x
   x = 182,578,362.30/21,301.08
6. Step 6: Final answer
   x = 8,571.32