Finding the Fourth Proportional to 6,685.32, 9,228.17 and 3,890.82

Step by Step Solution

1. Step 1: Write the proportion equation
   6,685.32 : 9,228.17 = 3,890.82 : x
2. Step 2: Convert to fraction form
   6,685.32/9,228.17 = 3,890.82/x
3. Step 3: Cross multiply
   6,685.32x = 9,228.17 × 3,890.82
4. Step 4: Simplify right side
   6,685.32x = 35,905,128.95
5. Step 5: Solve for x
   x = 35,905,128.95/6,685.32
6. Step 6: Final answer
   x = 5,370.74