Finding the Fourth Proportional to 3,779.46, 5,215.48 and 2,100.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.46 : 5,215.48 = 2,100.86 : x
2. Step 2: Convert to fraction form
   3,779.46/5,215.48 = 2,100.86/x
3. Step 3: Cross multiply
   3,779.46x = 5,215.48 × 2,100.86
4. Step 4: Simplify right side
   3,779.46x = 10,956,967.24
5. Step 5: Solve for x
   x = 10,956,967.24/3,779.46
6. Step 6: Final answer
   x = 2,899.08