Finding the Fourth Proportional to 3,910.42, 5,396.32 and 2,142.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.42 : 5,396.32 = 2,142.02 : x
2. Step 2: Convert to fraction form
   3,910.42/5,396.32 = 2,142.02/x
3. Step 3: Cross multiply
   3,910.42x = 5,396.32 × 2,142.02
4. Step 4: Simplify right side
   3,910.42x = 11,559,025.37
5. Step 5: Solve for x
   x = 11,559,025.37/3,910.42
6. Step 6: Final answer
   x = 2,955.95