Finding the Fourth Proportional to 2,613.48, 3,919.60 and 1,227.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.48 : 3,919.60 = 1,227.76 : x
2. Step 2: Convert to fraction form
   2,613.48/3,919.60 = 1,227.76/x
3. Step 3: Cross multiply
   2,613.48x = 3,919.60 × 1,227.76
4. Step 4: Simplify right side
   2,613.48x = 4,812,328.10
5. Step 5: Solve for x
   x = 4,812,328.10/2,613.48
6. Step 6: Final answer
   x = 1,841.35