Finding the Fourth Proportional to 3,329.59, 4,990.83 and 2,505.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,329.59 : 4,990.83 = 2,505.31 : x
2. Step 2: Convert to fraction form
   3,329.59/4,990.83 = 2,505.31/x
3. Step 3: Cross multiply
   3,329.59x = 4,990.83 × 2,505.31
4. Step 4: Simplify right side
   3,329.59x = 12,503,596.60
5. Step 5: Solve for x
   x = 12,503,596.60/3,329.59
6. Step 6: Final answer
   x = 3,755.30