Finding the Fourth Proportional to 3,997.81, 5,513.22 and 3,160.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.81 : 5,513.22 = 3,160.51 : x
2. Step 2: Convert to fraction form
   3,997.81/5,513.22 = 3,160.51/x
3. Step 3: Cross multiply
   3,997.81x = 5,513.22 × 3,160.51
4. Step 4: Simplify right side
   3,997.81x = 17,424,573.16
5. Step 5: Solve for x
   x = 17,424,573.16/3,997.81
6. Step 6: Final answer
   x = 4,358.53