Finding the Fourth Proportional to 1,821.56, 2,732.55 and 667.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.56 : 2,732.55 = 667.31 : x
2. Step 2: Convert to fraction form
   1,821.56/2,732.55 = 667.31/x
3. Step 3: Cross multiply
   1,821.56x = 2,732.55 × 667.31
4. Step 4: Simplify right side
   1,821.56x = 1,823,464.77
5. Step 5: Solve for x
   x = 1,823,464.77/1,821.56
6. Step 6: Final answer
   x = 1,001.04