Finding the Fourth Proportional to 5,622.12, 8,416.56 and 5,381.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,622.12 : 8,416.56 = 5,381.55 : x
2. Step 2: Convert to fraction form
   5,622.12/8,416.56 = 5,381.55/x
3. Step 3: Cross multiply
   5,622.12x = 8,416.56 × 5,381.55
4. Step 4: Simplify right side
   5,622.12x = 45,294,138.47
5. Step 5: Solve for x
   x = 45,294,138.47/5,622.12
6. Step 6: Final answer
   x = 8,056.42