Finding the Fourth Proportional to 13,531.34, 20,291.78 and 5,414.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,531.34 : 20,291.78 = 5,414.42 : x
2. Step 2: Convert to fraction form
   13,531.34/20,291.78 = 5,414.42/x
3. Step 3: Cross multiply
   13,531.34x = 20,291.78 × 5,414.42
4. Step 4: Simplify right side
   13,531.34x = 109,868,219.47
5. Step 5: Solve for x
   x = 109,868,219.47/13,531.34
6. Step 6: Final answer
   x = 8,119.54