Finding the Fourth Proportional to 1,002.48, 1,512.42 and 957.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.48 : 1,512.42 = 957.12 : x
2. Step 2: Convert to fraction form
   1,002.48/1,512.42 = 957.12/x
3. Step 3: Cross multiply
   1,002.48x = 1,512.42 × 957.12
4. Step 4: Simplify right side
   1,002.48x = 1,447,567.43
5. Step 5: Solve for x
   x = 1,447,567.43/1,002.48
6. Step 6: Final answer
   x = 1,443.99