Finding the Fourth Proportional to 3,779.91, 5,215.73 and 2,101.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.91 : 5,215.73 = 2,101.37 : x
2. Step 2: Convert to fraction form
   3,779.91/5,215.73 = 2,101.37/x
3. Step 3: Cross multiply
   3,779.91x = 5,215.73 × 2,101.37
4. Step 4: Simplify right side
   3,779.91x = 10,960,141.96
5. Step 5: Solve for x
   x = 10,960,141.96/3,779.91
6. Step 6: Final answer
   x = 2,899.58