Finding the Fourth Proportional to 3,421.34, 5,123.72 and 1,956.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,421.34 : 5,123.72 = 1,956.05 : x
2. Step 2: Convert to fraction form
   3,421.34/5,123.72 = 1,956.05/x
3. Step 3: Cross multiply
   3,421.34x = 5,123.72 × 1,956.05
4. Step 4: Simplify right side
   3,421.34x = 10,022,217.11
5. Step 5: Solve for x
   x = 10,022,217.11/3,421.34
6. Step 6: Final answer
   x = 2,929.33