Finding the Fourth Proportional to 3,779.01, 5,215.06 and 2,100.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.01 : 5,215.06 = 2,100.57 : x
2. Step 2: Convert to fraction form
   3,779.01/5,215.06 = 2,100.57/x
3. Step 3: Cross multiply
   3,779.01x = 5,215.06 × 2,100.57
4. Step 4: Simplify right side
   3,779.01x = 10,954,607.60
5. Step 5: Solve for x
   x = 10,954,607.60/3,779.01
6. Step 6: Final answer
   x = 2,898.80