Finding the Fourth Proportional to 2,688.05, 4,030.86 and 956.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.05 : 4,030.86 = 956.72 : x
2. Step 2: Convert to fraction form
   2,688.05/4,030.86 = 956.72/x
3. Step 3: Cross multiply
   2,688.05x = 4,030.86 × 956.72
4. Step 4: Simplify right side
   2,688.05x = 3,856,404.38
5. Step 5: Solve for x
   x = 3,856,404.38/2,688.05
6. Step 6: Final answer
   x = 1,434.65