Finding the Fourth Proportional to 2,613.06, 3,917.20 and 1,131.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.06 : 3,917.20 = 1,131.36 : x
2. Step 2: Convert to fraction form
   2,613.06/3,917.20 = 1,131.36/x
3. Step 3: Cross multiply
   2,613.06x = 3,917.20 × 1,131.36
4. Step 4: Simplify right side
   2,613.06x = 4,431,763.39
5. Step 5: Solve for x
   x = 4,431,763.39/2,613.06
6. Step 6: Final answer
   x = 1,696.01