Finding the Fourth Proportional to 2,123.27, 3,185.72 and 1,199.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.27 : 3,185.72 = 1,199.87 : x
2. Step 2: Convert to fraction form
   2,123.27/3,185.72 = 1,199.87/x
3. Step 3: Cross multiply
   2,123.27x = 3,185.72 × 1,199.87
4. Step 4: Simplify right side
   2,123.27x = 3,822,449.86
5. Step 5: Solve for x
   x = 3,822,449.86/2,123.27
6. Step 6: Final answer
   x = 1,800.27