Finding the Fourth Proportional to 1,086.87, 1,495.25 and 960.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.87 : 1,495.25 = 960.21 : x
2. Step 2: Convert to fraction form
   1,086.87/1,495.25 = 960.21/x
3. Step 3: Cross multiply
   1,086.87x = 1,495.25 × 960.21
4. Step 4: Simplify right side
   1,086.87x = 1,435,754.00
5. Step 5: Solve for x
   x = 1,435,754.00/1,086.87
6. Step 6: Final answer
   x = 1,321.00