Finding the Fourth Proportional to 3,870.09, 5,767.05 and 3,636.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.09 : 5,767.05 = 3,636.34 : x
2. Step 2: Convert to fraction form
   3,870.09/5,767.05 = 3,636.34/x
3. Step 3: Cross multiply
   3,870.09x = 5,767.05 × 3,636.34
4. Step 4: Simplify right side
   3,870.09x = 20,970,954.60
5. Step 5: Solve for x
   x = 20,970,954.60/3,870.09
6. Step 6: Final answer
   x = 5,418.73