Finding the Fourth Proportional to 6,883.76, 9,499.32 and 3,899.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,883.76 : 9,499.32 = 3,899.76 : x
2. Step 2: Convert to fraction form
   6,883.76/9,499.32 = 3,899.76/x
3. Step 3: Cross multiply
   6,883.76x = 9,499.32 × 3,899.76
4. Step 4: Simplify right side
   6,883.76x = 37,045,068.16
5. Step 5: Solve for x
   x = 37,045,068.16/6,883.76
6. Step 6: Final answer
   x = 5,381.52