Finding the Fourth Proportional to 3,779.47, 5,215.62 and 2,100.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.47 : 5,215.62 = 2,100.88 : x
2. Step 2: Convert to fraction form
   3,779.47/5,215.62 = 2,100.88/x
3. Step 3: Cross multiply
   3,779.47x = 5,215.62 × 2,100.88
4. Step 4: Simplify right side
   3,779.47x = 10,957,391.75
5. Step 5: Solve for x
   x = 10,957,391.75/3,779.47
6. Step 6: Final answer
   x = 2,899.19