Finding the Fourth Proportional to 1,479.86, 2,043.57 and 956.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,479.86 : 2,043.57 = 956.78 : x
2. Step 2: Convert to fraction form
   1,479.86/2,043.57 = 956.78/x
3. Step 3: Cross multiply
   1,479.86x = 2,043.57 × 956.78
4. Step 4: Simplify right side
   1,479.86x = 1,955,246.90
5. Step 5: Solve for x
   x = 1,955,246.90/1,479.86
6. Step 6: Final answer
   x = 1,321.24