Finding the Fourth Proportional to 3,699.48, 5,105.25 and 2,020.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.48 : 5,105.25 = 2,020.89 : x
2. Step 2: Convert to fraction form
   3,699.48/5,105.25 = 2,020.89/x
3. Step 3: Cross multiply
   3,699.48x = 5,105.25 × 2,020.89
4. Step 4: Simplify right side
   3,699.48x = 10,317,123.15
5. Step 5: Solve for x
   x = 10,317,123.15/3,699.48
6. Step 6: Final answer
   x = 2,788.80