Finding the Fourth Proportional to 6,221.12, 8,575.52 and 5,522.24

Step by Step Solution

1. Step 1: Write the proportion equation
   6,221.12 : 8,575.52 = 5,522.24 : x
2. Step 2: Convert to fraction form
   6,221.12/8,575.52 = 5,522.24/x
3. Step 3: Cross multiply
   6,221.12x = 8,575.52 × 5,522.24
4. Step 4: Simplify right side
   6,221.12x = 47,356,079.56
5. Step 5: Solve for x
   x = 47,356,079.56/6,221.12
6. Step 6: Final answer
   x = 7,612.15