Finding the Fourth Proportional to 3,870.34, 5,767.43 and 3,636.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.34 : 5,767.43 = 3,636.59 : x
2. Step 2: Convert to fraction form
   3,870.34/5,767.43 = 3,636.59/x
3. Step 3: Cross multiply
   3,870.34x = 5,767.43 × 3,636.59
4. Step 4: Simplify right side
   3,870.34x = 20,973,731.24
5. Step 5: Solve for x
   x = 20,973,731.24/3,870.34
6. Step 6: Final answer
   x = 5,419.10