Finding the Fourth Proportional to 3,779.12, 5,215.32 and 2,100.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.12 : 5,215.32 = 2,100.52 : x
2. Step 2: Convert to fraction form
   3,779.12/5,215.32 = 2,100.52/x
3. Step 3: Cross multiply
   3,779.12x = 5,215.32 × 2,100.52
4. Step 4: Simplify right side
   3,779.12x = 10,954,883.97
5. Step 5: Solve for x
   x = 10,954,883.97/3,779.12
6. Step 6: Final answer
   x = 2,898.79