Finding the Fourth Proportional to 2,156.37, 2,974.94 and 1,211.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.37 : 2,974.94 = 1,211.94 : x
2. Step 2: Convert to fraction form
   2,156.37/2,974.94 = 1,211.94/x
3. Step 3: Cross multiply
   2,156.37x = 2,974.94 × 1,211.94
4. Step 4: Simplify right side
   2,156.37x = 3,605,464.54
5. Step 5: Solve for x
   x = 3,605,464.54/2,156.37
6. Step 6: Final answer
   x = 1,672.01