Finding the Fourth Proportional to 1,406.20, 1,938.74 and 963.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.20 : 1,938.74 = 963.34 : x
2. Step 2: Convert to fraction form
   1,406.20/1,938.74 = 963.34/x
3. Step 3: Cross multiply
   1,406.20x = 1,938.74 × 963.34
4. Step 4: Simplify right side
   1,406.20x = 1,867,665.79
5. Step 5: Solve for x
   x = 1,867,665.79/1,406.20
6. Step 6: Final answer
   x = 1,328.17