Finding the Fourth Proportional to 1,142.76, 1,711.37 and 654.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.76 : 1,711.37 = 654.33 : x
2. Step 2: Convert to fraction form
   1,142.76/1,711.37 = 654.33/x
3. Step 3: Cross multiply
   1,142.76x = 1,711.37 × 654.33
4. Step 4: Simplify right side
   1,142.76x = 1,119,800.73
5. Step 5: Solve for x
   x = 1,119,800.73/1,142.76
6. Step 6: Final answer
   x = 979.91