Finding the Fourth Proportional to 1,613.78, 2,226.85 and 950.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.78 : 2,226.85 = 950.79 : x
2. Step 2: Convert to fraction form
   1,613.78/2,226.85 = 950.79/x
3. Step 3: Cross multiply
   1,613.78x = 2,226.85 × 950.79
4. Step 4: Simplify right side
   1,613.78x = 2,117,266.71
5. Step 5: Solve for x
   x = 2,117,266.71/1,613.78
6. Step 6: Final answer
   x = 1,311.99