Finding the Fourth Proportional to 2,196.27, 3,030.57 and 1,311.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.27 : 3,030.57 = 1,311.93 : x
2. Step 2: Convert to fraction form
   2,196.27/3,030.57 = 1,311.93/x
3. Step 3: Cross multiply
   2,196.27x = 3,030.57 × 1,311.93
4. Step 4: Simplify right side
   2,196.27x = 3,975,895.70
5. Step 5: Solve for x
   x = 3,975,895.70/2,196.27
6. Step 6: Final answer
   x = 1,810.29