Finding the Fourth Proportional to 2,805.72, 4,209.12 and 956.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,805.72 : 4,209.12 = 956.76 : x
2. Step 2: Convert to fraction form
   2,805.72/4,209.12 = 956.76/x
3. Step 3: Cross multiply
   2,805.72x = 4,209.12 × 956.76
4. Step 4: Simplify right side
   2,805.72x = 4,027,117.65
5. Step 5: Solve for x
   x = 4,027,117.65/2,805.72
6. Step 6: Final answer
   x = 1,435.32