Finding the Fourth Proportional to 2,156.55, 3,234.61 and 923.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.55 : 3,234.61 = 923.73 : x
2. Step 2: Convert to fraction form
   2,156.55/3,234.61 = 923.73/x
3. Step 3: Cross multiply
   2,156.55x = 3,234.61 × 923.73
4. Step 4: Simplify right side
   2,156.55x = 2,987,906.30
5. Step 5: Solve for x
   x = 2,987,906.30/2,156.55
6. Step 6: Final answer
   x = 1,385.50