Finding the Fourth Proportional to 6,889.82, 9,507.98 and 4,057.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,889.82 : 9,507.98 = 4,057.31 : x
2. Step 2: Convert to fraction form
   6,889.82/9,507.98 = 4,057.31/x
3. Step 3: Cross multiply
   6,889.82x = 9,507.98 × 4,057.31
4. Step 4: Simplify right side
   6,889.82x = 38,576,856.25
5. Step 5: Solve for x
   x = 38,576,856.25/6,889.82
6. Step 6: Final answer
   x = 5,599.11