Finding the Fourth Proportional to 5,257.83, 7,891.61 and 2,662.59

Step by Step Solution

1. Step 1: Write the proportion equation
   5,257.83 : 7,891.61 = 2,662.59 : x
2. Step 2: Convert to fraction form
   5,257.83/7,891.61 = 2,662.59/x
3. Step 3: Cross multiply
   5,257.83x = 7,891.61 × 2,662.59
4. Step 4: Simplify right side
   5,257.83x = 21,012,108.56
5. Step 5: Solve for x
   x = 21,012,108.56/5,257.83
6. Step 6: Final answer
   x = 3,996.35