Finding the Fourth Proportional to 1,613.46, 2,231.04 and 1,281.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.46 : 2,231.04 = 1,281.30 : x
2. Step 2: Convert to fraction form
   1,613.46/2,231.04 = 1,281.30/x
3. Step 3: Cross multiply
   1,613.46x = 2,231.04 × 1,281.30
4. Step 4: Simplify right side
   1,613.46x = 2,858,631.55
5. Step 5: Solve for x
   x = 2,858,631.55/1,613.46
6. Step 6: Final answer
   x = 1,771.74