Finding the Fourth Proportional to 3,699.59, 5,105.37 and 2,020.95

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.59 : 5,105.37 = 2,020.95 : x
2. Step 2: Convert to fraction form
   3,699.59/5,105.37 = 2,020.95/x
3. Step 3: Cross multiply
   3,699.59x = 5,105.37 × 2,020.95
4. Step 4: Simplify right side
   3,699.59x = 10,317,687.40
5. Step 5: Solve for x
   x = 10,317,687.40/3,699.59
6. Step 6: Final answer
   x = 2,788.88