Finding the Fourth Proportional to 1,141.20, 1,715.01 and 679.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.20 : 1,715.01 = 679.06 : x
2. Step 2: Convert to fraction form
   1,141.20/1,715.01 = 679.06/x
3. Step 3: Cross multiply
   1,141.20x = 1,715.01 × 679.06
4. Step 4: Simplify right side
   1,141.20x = 1,164,594.69
5. Step 5: Solve for x
   x = 1,164,594.69/1,141.20
6. Step 6: Final answer
   x = 1,020.50