Finding the Fourth Proportional to 2,121.27, 3,182.72 and 1,197.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,121.27 : 3,182.72 = 1,197.87 : x
2. Step 2: Convert to fraction form
   2,121.27/3,182.72 = 1,197.87/x
3. Step 3: Cross multiply
   2,121.27x = 3,182.72 × 1,197.87
4. Step 4: Simplify right side
   2,121.27x = 3,812,478.82
5. Step 5: Solve for x
   x = 3,812,478.82/2,121.27
6. Step 6: Final answer
   x = 1,797.26