Finding the Fourth Proportional to 2,196.25, 3,030.32 and 1,311.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.25 : 3,030.32 = 1,311.88 : x
2. Step 2: Convert to fraction form
   2,196.25/3,030.32 = 1,311.88/x
3. Step 3: Cross multiply
   2,196.25x = 3,030.32 × 1,311.88
4. Step 4: Simplify right side
   2,196.25x = 3,975,416.20
5. Step 5: Solve for x
   x = 3,975,416.20/2,196.25
6. Step 6: Final answer
   x = 1,810.09