Finding the Fourth Proportional to 2,155.81, 3,233.91 and 922.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.81 : 3,233.91 = 922.94 : x
2. Step 2: Convert to fraction form
   2,155.81/3,233.91 = 922.94/x
3. Step 3: Cross multiply
   2,155.81x = 3,233.91 × 922.94
4. Step 4: Simplify right side
   2,155.81x = 2,984,704.90
5. Step 5: Solve for x
   x = 2,984,704.90/2,155.81
6. Step 6: Final answer
   x = 1,384.49