Finding the Fourth Proportional to 3,485.83, 4,808.82 and 2,159.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,485.83 : 4,808.82 = 2,159.05 : x
2. Step 2: Convert to fraction form
   3,485.83/4,808.82 = 2,159.05/x
3. Step 3: Cross multiply
   3,485.83x = 4,808.82 × 2,159.05
4. Step 4: Simplify right side
   3,485.83x = 10,382,482.82
5. Step 5: Solve for x
   x = 10,382,482.82/3,485.83
6. Step 6: Final answer
   x = 2,978.48