Finding the Fourth Proportional to 2,196.67, 3,031.68 and 1,312.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.67 : 3,031.68 = 1,312.96 : x
2. Step 2: Convert to fraction form
   2,196.67/3,031.68 = 1,312.96/x
3. Step 3: Cross multiply
   2,196.67x = 3,031.68 × 1,312.96
4. Step 4: Simplify right side
   2,196.67x = 3,980,474.57
5. Step 5: Solve for x
   x = 3,980,474.57/2,196.67
6. Step 6: Final answer
   x = 1,812.05