Finding the Fourth Proportional to 6,883.76, 9,499.25 and 3,899.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,883.76 : 9,499.25 = 3,899.60 : x
2. Step 2: Convert to fraction form
   6,883.76/9,499.25 = 3,899.60/x
3. Step 3: Cross multiply
   6,883.76x = 9,499.25 × 3,899.60
4. Step 4: Simplify right side
   6,883.76x = 37,043,288.92
5. Step 5: Solve for x
   x = 37,043,288.92/6,883.76
6. Step 6: Final answer
   x = 5,381.26