Finding the Fourth Proportional to 1,512.56, 2,087.71 and 923.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,512.56 : 2,087.71 = 923.59 : x
2. Step 2: Convert to fraction form
   1,512.56/2,087.71 = 923.59/x
3. Step 3: Cross multiply
   1,512.56x = 2,087.71 × 923.59
4. Step 4: Simplify right side
   1,512.56x = 1,928,188.38
5. Step 5: Solve for x
   x = 1,928,188.38/1,512.56
6. Step 6: Final answer
   x = 1,274.78