Finding the Fourth Proportional to 2,196.75, 3,031.37 and 1,312.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.75 : 3,031.37 = 1,312.57 : x
2. Step 2: Convert to fraction form
   2,196.75/3,031.37 = 1,312.57/x
3. Step 3: Cross multiply
   2,196.75x = 3,031.37 × 1,312.57
4. Step 4: Simplify right side
   2,196.75x = 3,978,870.16
5. Step 5: Solve for x
   x = 3,978,870.16/2,196.75
6. Step 6: Final answer
   x = 1,811.25