Finding the Fourth Proportional to 2,196.42, 3,031.44 and 1,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,196.42 : 3,031.44 = 1,312.50 : x
2. Step 2: Convert to fraction form
   2,196.42/3,031.44 = 1,312.50/x
3. Step 3: Cross multiply
   2,196.42x = 3,031.44 × 1,312.50
4. Step 4: Simplify right side
   2,196.42x = 3,978,765
5. Step 5: Solve for x
   x = 3,978,765/2,196.42
6. Step 6: Final answer
   x = 1,811.48