Finding the Fourth Proportional to 3,779.90, 5,216.42 and 2,101.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.90 : 5,216.42 = 2,101.30 : x
2. Step 2: Convert to fraction form
   3,779.90/5,216.42 = 2,101.30/x
3. Step 3: Cross multiply
   3,779.90x = 5,216.42 × 2,101.30
4. Step 4: Simplify right side
   3,779.90x = 10,961,263.35
5. Step 5: Solve for x
   x = 10,961,263.35/3,779.90
6. Step 6: Final answer
   x = 2,899.88