Finding the Fourth Proportional to 5,818.17, 8,019.75 and 3,929.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,818.17 : 8,019.75 = 3,929.15 : x
2. Step 2: Convert to fraction form
   5,818.17/8,019.75 = 3,929.15/x
3. Step 3: Cross multiply
   5,818.17x = 8,019.75 × 3,929.15
4. Step 4: Simplify right side
   5,818.17x = 31,510,806.03
5. Step 5: Solve for x
   x = 31,510,806.03/5,818.17
6. Step 6: Final answer
   x = 5,415.93