Finding the Fourth Proportional to 3,779.78, 5,216.15 and 2,101.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.78 : 5,216.15 = 2,101.29 : x
2. Step 2: Convert to fraction form
   3,779.78/5,216.15 = 2,101.29/x
3. Step 3: Cross multiply
   3,779.78x = 5,216.15 × 2,101.29
4. Step 4: Simplify right side
   3,779.78x = 10,960,633.33
5. Step 5: Solve for x
   x = 10,960,633.33/3,779.78
6. Step 6: Final answer
   x = 2,899.81