Finding the Fourth Proportional to 1,965.50, 2,711.91 and 1,328.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.50 : 2,711.91 = 1,328.62 : x
2. Step 2: Convert to fraction form
   1,965.50/2,711.91 = 1,328.62/x
3. Step 3: Cross multiply
   1,965.50x = 2,711.91 × 1,328.62
4. Step 4: Simplify right side
   1,965.50x = 3,603,109.63
5. Step 5: Solve for x
   x = 3,603,109.63/1,965.50
6. Step 6: Final answer
   x = 1,833.18