Finding the Fourth Proportional to 3,428.91, 5,142.72 and 963.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,428.91 : 5,142.72 = 963.12 : x
2. Step 2: Convert to fraction form
   3,428.91/5,142.72 = 963.12/x
3. Step 3: Cross multiply
   3,428.91x = 5,142.72 × 963.12
4. Step 4: Simplify right side
   3,428.91x = 4,953,056.49
5. Step 5: Solve for x
   x = 4,953,056.49/3,428.91
6. Step 6: Final answer
   x = 1,444.50