Finding the Fourth Proportional to 1,358.76, 1,870.20 and 965.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.76 : 1,870.20 = 965.10 : x
2. Step 2: Convert to fraction form
   1,358.76/1,870.20 = 965.10/x
3. Step 3: Cross multiply
   1,358.76x = 1,870.20 × 965.10
4. Step 4: Simplify right side
   1,358.76x = 1,804,930.02
5. Step 5: Solve for x
   x = 1,804,930.02/1,358.76
6. Step 6: Final answer
   x = 1,328.37