Finding the Fourth Proportional to 1,742.78, 2,404.92 and 956.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,742.78 : 2,404.92 = 956.78 : x
2. Step 2: Convert to fraction form
   1,742.78/2,404.92 = 956.78/x
3. Step 3: Cross multiply
   1,742.78x = 2,404.92 × 956.78
4. Step 4: Simplify right side
   1,742.78x = 2,300,979.36
5. Step 5: Solve for x
   x = 2,300,979.36/1,742.78
6. Step 6: Final answer
   x = 1,320.29