Finding the Fourth Proportional to 6,521.31, 8,997.89 and 4,164.21

Step by Step Solution

1. Step 1: Write the proportion equation
   6,521.31 : 8,997.89 = 4,164.21 : x
2. Step 2: Convert to fraction form
   6,521.31/8,997.89 = 4,164.21/x
3. Step 3: Cross multiply
   6,521.31x = 8,997.89 × 4,164.21
4. Step 4: Simplify right side
   6,521.31x = 37,469,082.70
5. Step 5: Solve for x
   x = 37,469,082.70/6,521.31
6. Step 6: Final answer
   x = 5,745.64