Finding the Fourth Proportional to 3,699.40, 5,105.18 and 2,020.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.40 : 5,105.18 = 2,020.82 : x
2. Step 2: Convert to fraction form
   3,699.40/5,105.18 = 2,020.82/x
3. Step 3: Cross multiply
   3,699.40x = 5,105.18 × 2,020.82
4. Step 4: Simplify right side
   3,699.40x = 10,316,649.85
5. Step 5: Solve for x
   x = 10,316,649.85/3,699.40
6. Step 6: Final answer
   x = 2,788.74