Finding the Fourth Proportional to 2,196.15, 3,031.52 and 1,311.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.15 : 3,031.52 = 1,311.63 : x
2. Step 2: Convert to fraction form
   2,196.15/3,031.52 = 1,311.63/x
3. Step 3: Cross multiply
   2,196.15x = 3,031.52 × 1,311.63
4. Step 4: Simplify right side
   2,196.15x = 3,976,226.02
5. Step 5: Solve for x
   x = 3,976,226.02/2,196.15
6. Step 6: Final answer
   x = 1,810.54