Finding the Fourth Proportional to 1,709.72, 2,359.42 and 923.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,709.72 : 2,359.42 = 923.77 : x
2. Step 2: Convert to fraction form
   1,709.72/2,359.42 = 923.77/x
3. Step 3: Cross multiply
   1,709.72x = 2,359.42 × 923.77
4. Step 4: Simplify right side
   1,709.72x = 2,179,562.05
5. Step 5: Solve for x
   x = 2,179,562.05/1,709.72
6. Step 6: Final answer
   x = 1,274.81