Finding the Fourth Proportional to 1,105.77, 1,656.04 and 960.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.77 : 1,656.04 = 960.71 : x
2. Step 2: Convert to fraction form
   1,105.77/1,656.04 = 960.71/x
3. Step 3: Cross multiply
   1,105.77x = 1,656.04 × 960.71
4. Step 4: Simplify right side
   1,105.77x = 1,590,974.19
5. Step 5: Solve for x
   x = 1,590,974.19/1,105.77
6. Step 6: Final answer
   x = 1,438.79