Finding the Fourth Proportional to 1,142.10, 1,576.17 and 676.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.10 : 1,576.17 = 676.44 : x
2. Step 2: Convert to fraction form
   1,142.10/1,576.17 = 676.44/x
3. Step 3: Cross multiply
   1,142.10x = 1,576.17 × 676.44
4. Step 4: Simplify right side
   1,142.10x = 1,066,184.43
5. Step 5: Solve for x
   x = 1,066,184.43/1,142.10
6. Step 6: Final answer
   x = 933.53