Finding the Fourth Proportional to 2,155.64, 3,233.59 and 923.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.64 : 3,233.59 = 923.09 : x
2. Step 2: Convert to fraction form
   2,155.64/3,233.59 = 923.09/x
3. Step 3: Cross multiply
   2,155.64x = 3,233.59 × 923.09
4. Step 4: Simplify right side
   2,155.64x = 2,984,876.12
5. Step 5: Solve for x
   x = 2,984,876.12/2,155.64
6. Step 6: Final answer
   x = 1,384.69