Finding the Fourth Proportional to 1,442.72, 2,160.72 and 954.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.72 : 2,160.72 = 954.56 : x
2. Step 2: Convert to fraction form
   1,442.72/2,160.72 = 954.56/x
3. Step 3: Cross multiply
   1,442.72x = 2,160.72 × 954.56
4. Step 4: Simplify right side
   1,442.72x = 2,062,536.88
5. Step 5: Solve for x
   x = 2,062,536.88/1,442.72
6. Step 6: Final answer
   x = 1,429.62