Finding the Fourth Proportional to 1,912.84, 2,869.86 and 1,328.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,912.84 : 2,869.86 = 1,328.41 : x
2. Step 2: Convert to fraction form
   1,912.84/2,869.86 = 1,328.41/x
3. Step 3: Cross multiply
   1,912.84x = 2,869.86 × 1,328.41
4. Step 4: Simplify right side
   1,912.84x = 3,812,350.72
5. Step 5: Solve for x
   x = 3,812,350.72/1,912.84
6. Step 6: Final answer
   x = 1,993.03