Finding the Fourth Proportional to 2,196.82, 3,031.88 and 1,312.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.82 : 3,031.88 = 1,312.62 : x
2. Step 2: Convert to fraction form
   2,196.82/3,031.88 = 1,312.62/x
3. Step 3: Cross multiply
   2,196.82x = 3,031.88 × 1,312.62
4. Step 4: Simplify right side
   2,196.82x = 3,979,706.33
5. Step 5: Solve for x
   x = 3,979,706.33/2,196.82
6. Step 6: Final answer
   x = 1,811.58