Finding the Fourth Proportional to 3,428.55, 5,142.42 and 963.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,428.55 : 5,142.42 = 963.57 : x
2. Step 2: Convert to fraction form
   3,428.55/5,142.42 = 963.57/x
3. Step 3: Cross multiply
   3,428.55x = 5,142.42 × 963.57
4. Step 4: Simplify right side
   3,428.55x = 4,955,081.64
5. Step 5: Solve for x
   x = 4,955,081.64/3,428.55
6. Step 6: Final answer
   x = 1,445.24