Finding the Fourth Proportional to 2,196.41, 3,030.68 and 1,311.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.41 : 3,030.68 = 1,311.89 : x
2. Step 2: Convert to fraction form
   2,196.41/3,030.68 = 1,311.89/x
3. Step 3: Cross multiply
   2,196.41x = 3,030.68 × 1,311.89
4. Step 4: Simplify right side
   2,196.41x = 3,975,897.07
5. Step 5: Solve for x
   x = 3,975,897.07/2,196.41
6. Step 6: Final answer
   x = 1,810.18