Finding the Fourth Proportional to 3,910.89, 5,397.01 and 2,142.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910.89 : 5,397.01 = 2,142.51 : x
2. Step 2: Convert to fraction form
   3,910.89/5,397.01 = 2,142.51/x
3. Step 3: Cross multiply
   3,910.89x = 5,397.01 × 2,142.51
4. Step 4: Simplify right side
   3,910.89x = 11,563,147.90
5. Step 5: Solve for x
   x = 11,563,147.90/3,910.89
6. Step 6: Final answer
   x = 2,956.65