Finding the Fourth Proportional to 3,699.17, 5,104.78 and 2,020.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.17 : 5,104.78 = 2,020.57 : x
2. Step 2: Convert to fraction form
   3,699.17/5,104.78 = 2,020.57/x
3. Step 3: Cross multiply
   3,699.17x = 5,104.78 × 2,020.57
4. Step 4: Simplify right side
   3,699.17x = 10,314,547.51
5. Step 5: Solve for x
   x = 10,314,547.51/3,699.17
6. Step 6: Final answer
   x = 2,788.34