Finding the Fourth Proportional to 1,447.46, 1,997.80 and 923.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.46 : 1,997.80 = 923.40 : x
2. Step 2: Convert to fraction form
   1,447.46/1,997.80 = 923.40/x
3. Step 3: Cross multiply
   1,447.46x = 1,997.80 × 923.40
4. Step 4: Simplify right side
   1,447.46x = 1,844,768.52
5. Step 5: Solve for x
   x = 1,844,768.52/1,447.46
6. Step 6: Final answer
   x = 1,274.49