Finding the Fourth Proportional to 2,156.28, 3,231.50 and 984.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.28 : 3,231.50 = 984.84 : x
2. Step 2: Convert to fraction form
   2,156.28/3,231.50 = 984.84/x
3. Step 3: Cross multiply
   2,156.28x = 3,231.50 × 984.84
4. Step 4: Simplify right side
   2,156.28x = 3,182,500.80
5. Step 5: Solve for x
   x = 3,182,500.80/2,156.28
6. Step 6: Final answer
   x = 1,475.92