Finding the Fourth Proportional to 3,910.43, 5,396.38 and 2,142.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.43 : 5,396.38 = 2,142.03 : x
2. Step 2: Convert to fraction form
   3,910.43/5,396.38 = 2,142.03/x
3. Step 3: Cross multiply
   3,910.43x = 5,396.38 × 2,142.03
4. Step 4: Simplify right side
   3,910.43x = 11,559,221.34
5. Step 5: Solve for x
   x = 11,559,221.34/3,910.43
6. Step 6: Final answer
   x = 2,956.00