Finding the Fourth Proportional to 6,883.72, 9,499.31 and 3,899.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,883.72 : 9,499.31 = 3,899.54 : x
2. Step 2: Convert to fraction form
   6,883.72/9,499.31 = 3,899.54/x
3. Step 3: Cross multiply
   6,883.72x = 9,499.31 × 3,899.54
4. Step 4: Simplify right side
   6,883.72x = 37,042,958.19
5. Step 5: Solve for x
   x = 37,042,958.19/6,883.72
6. Step 6: Final answer
   x = 5,381.24