Finding the Fourth Proportional to 3,439.65, 5,159.46 and 1,131.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.65 : 5,159.46 = 1,131.15 : x
2. Step 2: Convert to fraction form
   3,439.65/5,159.46 = 1,131.15/x
3. Step 3: Cross multiply
   3,439.65x = 5,159.46 × 1,131.15
4. Step 4: Simplify right side
   3,439.65x = 5,836,123.18
5. Step 5: Solve for x
   x = 5,836,123.18/3,439.65
6. Step 6: Final answer
   x = 1,696.72