Finding the Fourth Proportional to 2,005.56, 2,767.86 and 1,121.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.56 : 2,767.86 = 1,121.49 : x
2. Step 2: Convert to fraction form
   2,005.56/2,767.86 = 1,121.49/x
3. Step 3: Cross multiply
   2,005.56x = 2,767.86 × 1,121.49
4. Step 4: Simplify right side
   2,005.56x = 3,104,127.31
5. Step 5: Solve for x
   x = 3,104,127.31/2,005.56
6. Step 6: Final answer
   x = 1,547.76