Finding the Fourth Proportional to 6,215.90, 8,574.17 and 3,976.98

Step by Step Solution

1. Step 1: Write the proportion equation
   6,215.90 : 8,574.17 = 3,976.98 : x
2. Step 2: Convert to fraction form
   6,215.90/8,574.17 = 3,976.98/x
3. Step 3: Cross multiply
   6,215.90x = 8,574.17 × 3,976.98
4. Step 4: Simplify right side
   6,215.90x = 34,099,282.72
5. Step 5: Solve for x
   x = 34,099,282.72/6,215.90
6. Step 6: Final answer
   x = 5,485.82