Finding the Fourth Proportional to 3,934.53, 5,429.72 and 2,142.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,934.53 : 5,429.72 = 2,142.06 : x
2. Step 2: Convert to fraction form
   3,934.53/5,429.72 = 2,142.06/x
3. Step 3: Cross multiply
   3,934.53x = 5,429.72 × 2,142.06
4. Step 4: Simplify right side
   3,934.53x = 11,630,808.64
5. Step 5: Solve for x
   x = 11,630,808.64/3,934.53
6. Step 6: Final answer
   x = 2,956.08