Finding the Fourth Proportional to 5,436.90, 8,139.90 and 3,582.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,436.90 : 8,139.90 = 3,582.42 : x
2. Step 2: Convert to fraction form
   5,436.90/8,139.90 = 3,582.42/x
3. Step 3: Cross multiply
   5,436.90x = 8,139.90 × 3,582.42
4. Step 4: Simplify right side
   5,436.90x = 29,160,540.56
5. Step 5: Solve for x
   x = 29,160,540.56/5,436.90
6. Step 6: Final answer
   x = 5,363.45