Finding the Fourth Proportional to 2,005.43, 2,767.50 and 1,121.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.43 : 2,767.50 = 1,121.31 : x
2. Step 2: Convert to fraction form
   2,005.43/2,767.50 = 1,121.31/x
3. Step 3: Cross multiply
   2,005.43x = 2,767.50 × 1,121.31
4. Step 4: Simplify right side
   2,005.43x = 3,103,225.43
5. Step 5: Solve for x
   x = 3,103,225.43/2,005.43
6. Step 6: Final answer
   x = 1,547.42