Finding the Fourth Proportional to 1,512.59, 2,087.10 and 923.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,512.59 : 2,087.10 = 923.31 : x
2. Step 2: Convert to fraction form
   1,512.59/2,087.10 = 923.31/x
3. Step 3: Cross multiply
   1,512.59x = 2,087.10 × 923.31
4. Step 4: Simplify right side
   1,512.59x = 1,927,040.30
5. Step 5: Solve for x
   x = 1,927,040.30/1,512.59
6. Step 6: Final answer
   x = 1,274.00