Finding the Fourth Proportional to 7,071.32, 9,760.17 and 4,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,071.32 : 9,760.17 = 4,086.72 : x
2. Step 2: Convert to fraction form
   7,071.32/9,760.17 = 4,086.72/x
3. Step 3: Cross multiply
   7,071.32x = 9,760.17 × 4,086.72
4. Step 4: Simplify right side
   7,071.32x = 39,887,085.77
5. Step 5: Solve for x
   x = 39,887,085.77/7,071.32
6. Step 6: Final answer
   x = 5,640.69