Finding the Fourth Proportional to 1,404.30, 1,938.42 and 963.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.30 : 1,938.42 = 963.66 : x
2. Step 2: Convert to fraction form
   1,404.30/1,938.42 = 963.66/x
3. Step 3: Cross multiply
   1,404.30x = 1,938.42 × 963.66
4. Step 4: Simplify right side
   1,404.30x = 1,867,977.82
5. Step 5: Solve for x
   x = 1,867,977.82/1,404.30
6. Step 6: Final answer
   x = 1,330.18