Finding the Fourth Proportional to 1,404.31, 1,939.67 and 963.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.31 : 1,939.67 = 963.67 : x
2. Step 2: Convert to fraction form
   1,404.31/1,939.67 = 963.67/x
3. Step 3: Cross multiply
   1,404.31x = 1,939.67 × 963.67
4. Step 4: Simplify right side
   1,404.31x = 1,869,201.79
5. Step 5: Solve for x
   x = 1,869,201.79/1,404.31
6. Step 6: Final answer
   x = 1,331.05