Finding the Fourth Proportional to 2,196.16, 3,030.72 and 1,311.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.16 : 3,030.72 = 1,311.52 : x
2. Step 2: Convert to fraction form
   2,196.16/3,030.72 = 1,311.52/x
3. Step 3: Cross multiply
   2,196.16x = 3,030.72 × 1,311.52
4. Step 4: Simplify right side
   2,196.16x = 3,974,849.89
5. Step 5: Solve for x
   x = 3,974,849.89/2,196.16
6. Step 6: Final answer
   x = 1,809.91