Finding the Fourth Proportional to 3,779.24, 5,215.25 and 2,100.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.24 : 5,215.25 = 2,100.79 : x
2. Step 2: Convert to fraction form
   3,779.24/5,215.25 = 2,100.79/x
3. Step 3: Cross multiply
   3,779.24x = 5,215.25 × 2,100.79
4. Step 4: Simplify right side
   3,779.24x = 10,956,156.82
5. Step 5: Solve for x
   x = 10,956,156.82/3,779.24
6. Step 6: Final answer
   x = 2,899.04