Finding the Fourth Proportional to 2,156.22, 3,233.94 and 985.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.22 : 3,233.94 = 985.94 : x
2. Step 2: Convert to fraction form
   2,156.22/3,233.94 = 985.94/x
3. Step 3: Cross multiply
   2,156.22x = 3,233.94 × 985.94
4. Step 4: Simplify right side
   2,156.22x = 3,188,470.80
5. Step 5: Solve for x
   x = 3,188,470.80/2,156.22
6. Step 6: Final answer
   x = 1,478.73