Finding the Fourth Proportional to 1,109.72, 1,656.65 and 963.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.72 : 1,656.65 = 963.96 : x
2. Step 2: Convert to fraction form
   1,109.72/1,656.65 = 963.96/x
3. Step 3: Cross multiply
   1,109.72x = 1,656.65 × 963.96
4. Step 4: Simplify right side
   1,109.72x = 1,596,944.33
5. Step 5: Solve for x
   x = 1,596,944.33/1,109.72
6. Step 6: Final answer
   x = 1,439.05