Finding the Fourth Proportional to 3,937.16, 5,434.71 and 2,611.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,937.16 : 5,434.71 = 2,611.31 : x
2. Step 2: Convert to fraction form
   3,937.16/5,434.71 = 2,611.31/x
3. Step 3: Cross multiply
   3,937.16x = 5,434.71 × 2,611.31
4. Step 4: Simplify right side
   3,937.16x = 14,191,712.57
5. Step 5: Solve for x
   x = 14,191,712.57/3,937.16
6. Step 6: Final answer
   x = 3,604.56