Finding the Fourth Proportional to 21,305.92, 31,956.72 and 5,721.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,305.92 : 31,956.72 = 5,721.52 : x
2. Step 2: Convert to fraction form
   21,305.92/31,956.72 = 5,721.52/x
3. Step 3: Cross multiply
   21,305.92x = 31,956.72 × 5,721.52
4. Step 4: Simplify right side
   21,305.92x = 182,841,012.61
5. Step 5: Solve for x
   x = 182,841,012.61/21,305.92
6. Step 6: Final answer
   x = 8,581.70