Finding the Fourth Proportional to 3,779.67, 5,215.72 and 2,100.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.67 : 5,215.72 = 2,100.98 : x
2. Step 2: Convert to fraction form
   3,779.67/5,215.72 = 2,100.98/x
3. Step 3: Cross multiply
   3,779.67x = 5,215.72 × 2,100.98
4. Step 4: Simplify right side
   3,779.67x = 10,958,123.41
5. Step 5: Solve for x
   x = 10,958,123.41/3,779.67
6. Step 6: Final answer
   x = 2,899.23