Finding the Fourth Proportional to 2,111.02, 3,168.21 and 956.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.02 : 3,168.21 = 956.86 : x
2. Step 2: Convert to fraction form
   2,111.02/3,168.21 = 956.86/x
3. Step 3: Cross multiply
   2,111.02x = 3,168.21 × 956.86
4. Step 4: Simplify right side
   2,111.02x = 3,031,533.42
5. Step 5: Solve for x
   x = 3,031,533.42/2,111.02
6. Step 6: Final answer
   x = 1,436.05