Finding the Fourth Proportional to 3,931.16, 5,424.98 and 2,162.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.16 : 5,424.98 = 2,162.72 : x
2. Step 2: Convert to fraction form
   3,931.16/5,424.98 = 2,162.72/x
3. Step 3: Cross multiply
   3,931.16x = 5,424.98 × 2,162.72
4. Step 4: Simplify right side
   3,931.16x = 11,732,712.75
5. Step 5: Solve for x
   x = 11,732,712.75/3,931.16
6. Step 6: Final answer
   x = 2,984.54