Finding the Fourth Proportional to 1,009.02, 1,393.88 and 960.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.02 : 1,393.88 = 960.42 : x
2. Step 2: Convert to fraction form
   1,009.02/1,393.88 = 960.42/x
3. Step 3: Cross multiply
   1,009.02x = 1,393.88 × 960.42
4. Step 4: Simplify right side
   1,009.02x = 1,338,705.43
5. Step 5: Solve for x
   x = 1,338,705.43/1,009.02
6. Step 6: Final answer
   x = 1,326.74