Finding the Fourth Proportional to 2,171.71, 2,996.96 and 1,201.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.71 : 2,996.96 = 1,201.57 : x
2. Step 2: Convert to fraction form
   2,171.71/2,996.96 = 1,201.57/x
3. Step 3: Cross multiply
   2,171.71x = 2,996.96 × 1,201.57
4. Step 4: Simplify right side
   2,171.71x = 3,601,057.23
5. Step 5: Solve for x
   x = 3,601,057.23/2,171.71
6. Step 6: Final answer
   x = 1,658.17