Finding the Fourth Proportional to 6,884.72, 9,499.34 and 3,899.87

Step by Step Solution

1. Step 1: Write the proportion equation
   6,884.72 : 9,499.34 = 3,899.87 : x
2. Step 2: Convert to fraction form
   6,884.72/9,499.34 = 3,899.87/x
3. Step 3: Cross multiply
   6,884.72x = 9,499.34 × 3,899.87
4. Step 4: Simplify right side
   6,884.72x = 37,046,153.34
5. Step 5: Solve for x
   x = 37,046,153.34/6,884.72
6. Step 6: Final answer
   x = 5,380.93