Finding the Fourth Proportional to 2,261.82, 3,121.03 and 1,317.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,261.82 : 3,121.03 = 1,317.92 : x
2. Step 2: Convert to fraction form
   2,261.82/3,121.03 = 1,317.92/x
3. Step 3: Cross multiply
   2,261.82x = 3,121.03 × 1,317.92
4. Step 4: Simplify right side
   2,261.82x = 4,113,271.46
5. Step 5: Solve for x
   x = 4,113,271.46/2,261.82
6. Step 6: Final answer
   x = 1,818.56