Finding the Fourth Proportional to 2,196.32, 3,030.72 and 1,311.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.32 : 3,030.72 = 1,311.68 : x
2. Step 2: Convert to fraction form
   2,196.32/3,030.72 = 1,311.68/x
3. Step 3: Cross multiply
   2,196.32x = 3,030.72 × 1,311.68
4. Step 4: Simplify right side
   2,196.32x = 3,975,334.81
5. Step 5: Solve for x
   x = 3,975,334.81/2,196.32
6. Step 6: Final answer
   x = 1,810.00