Finding the Fourth Proportional to 6,638.69, 9,158.25 and 4,119.87

Step by Step Solution

1. Step 1: Write the proportion equation
   6,638.69 : 9,158.25 = 4,119.87 : x
2. Step 2: Convert to fraction form
   6,638.69/9,158.25 = 4,119.87/x
3. Step 3: Cross multiply
   6,638.69x = 9,158.25 × 4,119.87
4. Step 4: Simplify right side
   6,638.69x = 37,730,799.43
5. Step 5: Solve for x
   x = 37,730,799.43/6,638.69
6. Step 6: Final answer
   x = 5,683.47