Finding the Fourth Proportional to 3,430.34, 5,144.72 and 965.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,430.34 : 5,144.72 = 965.40 : x
2. Step 2: Convert to fraction form
   3,430.34/5,144.72 = 965.40/x
3. Step 3: Cross multiply
   3,430.34x = 5,144.72 × 965.40
4. Step 4: Simplify right side
   3,430.34x = 4,966,707.86
5. Step 5: Solve for x
   x = 4,966,707.86/3,430.34
6. Step 6: Final answer
   x = 1,447.88