Finding the Fourth Proportional to 3,779.44, 5,215.33 and 2,100.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.44 : 5,215.33 = 2,100.72 : x
2. Step 2: Convert to fraction form
   3,779.44/5,215.33 = 2,100.72/x
3. Step 3: Cross multiply
   3,779.44x = 5,215.33 × 2,100.72
4. Step 4: Simplify right side
   3,779.44x = 10,955,916.71
5. Step 5: Solve for x
   x = 10,955,916.71/3,779.44
6. Step 6: Final answer
   x = 2,898.82