Finding the Fourth Proportional to 5,407.16, 8,086.03 and 3,931.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,407.16 : 8,086.03 = 3,931.34 : x
2. Step 2: Convert to fraction form
   5,407.16/8,086.03 = 3,931.34/x
3. Step 3: Cross multiply
   5,407.16x = 8,086.03 × 3,931.34
4. Step 4: Simplify right side
   5,407.16x = 31,788,933.18
5. Step 5: Solve for x
   x = 31,788,933.18/5,407.16
6. Step 6: Final answer
   x = 5,879.04