Finding the Fourth Proportional to 3,937.28, 5,436.73 and 3,516.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,937.28 : 5,436.73 = 3,516.89 : x
2. Step 2: Convert to fraction form
   3,937.28/5,436.73 = 3,516.89/x
3. Step 3: Cross multiply
   3,937.28x = 5,436.73 × 3,516.89
4. Step 4: Simplify right side
   3,937.28x = 19,120,345.39
5. Step 5: Solve for x
   x = 19,120,345.39/3,937.28
6. Step 6: Final answer
   x = 4,856.24