Finding the Fourth Proportional to 2,156.31, 3,231.75 and 922.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.31 : 3,231.75 = 922.27 : x
2. Step 2: Convert to fraction form
   2,156.31/3,231.75 = 922.27/x
3. Step 3: Cross multiply
   2,156.31x = 3,231.75 × 922.27
4. Step 4: Simplify right side
   2,156.31x = 2,980,529.91
5. Step 5: Solve for x
   x = 2,980,529.91/2,156.31
6. Step 6: Final answer
   x = 1,382.24