Finding the Fourth Proportional to 3,779.83, 5,206.41 and 2,643.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,779.83 : 5,206.41 = 2,643.51 : x
2. Step 2: Convert to fraction form
   3,779.83/5,206.41 = 2,643.51/x
3. Step 3: Cross multiply
   3,779.83x = 5,206.41 × 2,643.51
4. Step 4: Simplify right side
   3,779.83x = 13,763,196.90
5. Step 5: Solve for x
   x = 13,763,196.90/3,779.83
6. Step 6: Final answer
   x = 3,641.22