Finding the Fourth Proportional to 1,613.10, 2,225.18 and 949.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.10 : 2,225.18 = 949.86 : x
2. Step 2: Convert to fraction form
   1,613.10/2,225.18 = 949.86/x
3. Step 3: Cross multiply
   1,613.10x = 2,225.18 × 949.86
4. Step 4: Simplify right side
   1,613.10x = 2,113,609.47
5. Step 5: Solve for x
   x = 2,113,609.47/1,613.10
6. Step 6: Final answer
   x = 1,310.28