Finding the Fourth Proportional to 3,664.47, 5,057.01 and 2,171.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,664.47 : 5,057.01 = 2,171.82 : x
2. Step 2: Convert to fraction form
   3,664.47/5,057.01 = 2,171.82/x
3. Step 3: Cross multiply
   3,664.47x = 5,057.01 × 2,171.82
4. Step 4: Simplify right side
   3,664.47x = 10,982,915.46
5. Step 5: Solve for x
   x = 10,982,915.46/3,664.47
6. Step 6: Final answer
   x = 2,997.14