Finding the Fourth Proportional to 1,141.58, 1,715.56 and 679.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.58 : 1,715.56 = 679.43 : x
2. Step 2: Convert to fraction form
   1,141.58/1,715.56 = 679.43/x
3. Step 3: Cross multiply
   1,141.58x = 1,715.56 × 679.43
4. Step 4: Simplify right side
   1,141.58x = 1,165,599.69
5. Step 5: Solve for x
   x = 1,165,599.69/1,141.58
6. Step 6: Final answer
   x = 1,021.04