Finding the Fourth Proportional to 2,196.12, 3,031.02 and 1,312.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.12 : 3,031.02 = 1,312.46 : x
2. Step 2: Convert to fraction form
   2,196.12/3,031.02 = 1,312.46/x
3. Step 3: Cross multiply
   2,196.12x = 3,031.02 × 1,312.46
4. Step 4: Simplify right side
   2,196.12x = 3,978,092.51
5. Step 5: Solve for x
   x = 3,978,092.51/2,196.12
6. Step 6: Final answer
   x = 1,811.42