Finding the Fourth Proportional to 1,428.82, 1,972.32 and 963.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.82 : 1,972.32 = 963.34 : x
2. Step 2: Convert to fraction form
   1,428.82/1,972.32 = 963.34/x
3. Step 3: Cross multiply
   1,428.82x = 1,972.32 × 963.34
4. Step 4: Simplify right side
   1,428.82x = 1,900,014.75
5. Step 5: Solve for x
   x = 1,900,014.75/1,428.82
6. Step 6: Final answer
   x = 1,329.78