Finding the Fourth Proportional to 2,523.78, 3,779.25 and 2,111.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,523.78 : 3,779.25 = 2,111.88 : x
2. Step 2: Convert to fraction form
   2,523.78/3,779.25 = 2,111.88/x
3. Step 3: Cross multiply
   2,523.78x = 3,779.25 × 2,111.88
4. Step 4: Simplify right side
   2,523.78x = 7,981,322.49
5. Step 5: Solve for x
   x = 7,981,322.49/2,523.78
6. Step 6: Final answer
   x = 3,162.45