Finding the Fourth Proportional to 3,931.33, 5,425.15 and 2,162.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.33 : 5,425.15 = 2,162.91 : x
2. Step 2: Convert to fraction form
   3,931.33/5,425.15 = 2,162.91/x
3. Step 3: Cross multiply
   3,931.33x = 5,425.15 × 2,162.91
4. Step 4: Simplify right side
   3,931.33x = 11,734,111.19
5. Step 5: Solve for x
   x = 11,734,111.19/3,931.33
6. Step 6: Final answer
   x = 2,984.77