Finding the Fourth Proportional to 1,153.31, 1,589.81 and 951.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,153.31 : 1,589.81 = 951.71 : x
2. Step 2: Convert to fraction form
   1,153.31/1,589.81 = 951.71/x
3. Step 3: Cross multiply
   1,153.31x = 1,589.81 × 951.71
4. Step 4: Simplify right side
   1,153.31x = 1,513,025.37
5. Step 5: Solve for x
   x = 1,513,025.37/1,153.31
6. Step 6: Final answer
   x = 1,311.90