Finding the Fourth Proportional to 2,289.50, 3,157.18 and 1,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.50 : 3,157.18 = 1,868.50 : x
2. Step 2: Convert to fraction form
   2,289.50/3,157.18 = 1,868.50/x
3. Step 3: Cross multiply
   2,289.50x = 3,157.18 × 1,868.50
4. Step 4: Simplify right side
   2,289.50x = 5,899,190.83
5. Step 5: Solve for x
   x = 5,899,190.83/2,289.50
6. Step 6: Final answer
   x = 2,576.63