Finding the Fourth Proportional to 3,779.98, 5,215.89 and 2,101.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.98 : 5,215.89 = 2,101.12 : x
2. Step 2: Convert to fraction form
   3,779.98/5,215.89 = 2,101.12/x
3. Step 3: Cross multiply
   3,779.98x = 5,215.89 × 2,101.12
4. Step 4: Simplify right side
   3,779.98x = 10,959,210.80
5. Step 5: Solve for x
   x = 10,959,210.80/3,779.98
6. Step 6: Final answer
   x = 2,899.28