Finding the Fourth Proportional to 1,433.03, 2,144.68 and 856.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,433.03 : 2,144.68 = 856.31 : x
2. Step 2: Convert to fraction form
   1,433.03/2,144.68 = 856.31/x
3. Step 3: Cross multiply
   1,433.03x = 2,144.68 × 856.31
4. Step 4: Simplify right side
   1,433.03x = 1,836,498.07
5. Step 5: Solve for x
   x = 1,836,498.07/1,433.03
6. Step 6: Final answer
   x = 1,281.55