Finding the Fourth Proportional to 6,818.71, 9,408.73 and 3,985.65

Step by Step Solution

1. Step 1: Write the proportion equation
   6,818.71 : 9,408.73 = 3,985.65 : x
2. Step 2: Convert to fraction form
   6,818.71/9,408.73 = 3,985.65/x
3. Step 3: Cross multiply
   6,818.71x = 9,408.73 × 3,985.65
4. Step 4: Simplify right side
   6,818.71x = 37,499,904.72
5. Step 5: Solve for x
   x = 37,499,904.72/6,818.71
6. Step 6: Final answer
   x = 5,499.56