Finding the Fourth Proportional to 9,721.16, 14,578.68 and 3,145.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,721.16 : 14,578.68 = 3,145.82 : x
2. Step 2: Convert to fraction form
   9,721.16/14,578.68 = 3,145.82/x
3. Step 3: Cross multiply
   9,721.16x = 14,578.68 × 3,145.82
4. Step 4: Simplify right side
   9,721.16x = 45,861,903.12
5. Step 5: Solve for x
   x = 45,861,903.12/9,721.16
6. Step 6: Final answer
   x = 4,717.74