Finding the Fourth Proportional to 4,005.80, 5,528.72 and 2,390.82

Step by Step Solution

1. Step 1: Write the proportion equation
   4,005.80 : 5,528.72 = 2,390.82 : x
2. Step 2: Convert to fraction form
   4,005.80/5,528.72 = 2,390.82/x
3. Step 3: Cross multiply
   4,005.80x = 5,528.72 × 2,390.82
4. Step 4: Simplify right side
   4,005.80x = 13,218,159.59
5. Step 5: Solve for x
   x = 13,218,159.59/4,005.80
6. Step 6: Final answer
   x = 3,299.76