Finding the Fourth Proportional to 2,148.78, 2,958.48 and 1,896.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,148.78 : 2,958.48 = 1,896.51 : x
2. Step 2: Convert to fraction form
   2,148.78/2,958.48 = 1,896.51/x
3. Step 3: Cross multiply
   2,148.78x = 2,958.48 × 1,896.51
4. Step 4: Simplify right side
   2,148.78x = 5,610,786.90
5. Step 5: Solve for x
   x = 5,610,786.90/2,148.78
6. Step 6: Final answer
   x = 2,611.15