Finding the Fourth Proportional to 1,116.24, 1,667.95 and 851.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.24 : 1,667.95 = 851.23 : x
2. Step 2: Convert to fraction form
   1,116.24/1,667.95 = 851.23/x
3. Step 3: Cross multiply
   1,116.24x = 1,667.95 × 851.23
4. Step 4: Simplify right side
   1,116.24x = 1,419,809.08
5. Step 5: Solve for x
   x = 1,419,809.08/1,116.24
6. Step 6: Final answer
   x = 1,271.96