Finding the Fourth Proportional to 1,142.24, 1,704.81 and 985.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.24 : 1,704.81 = 985.37 : x
2. Step 2: Convert to fraction form
   1,142.24/1,704.81 = 985.37/x
3. Step 3: Cross multiply
   1,142.24x = 1,704.81 × 985.37
4. Step 4: Simplify right side
   1,142.24x = 1,679,863.80
5. Step 5: Solve for x
   x = 1,679,863.80/1,142.24
6. Step 6: Final answer
   x = 1,470.68