Finding the Fourth Proportional to 8,557.85, 12,820.07 and 5,627.27

Step by Step Solution

1. Step 1: Write the proportion equation
   8,557.85 : 12,820.07 = 5,627.27 : x
2. Step 2: Convert to fraction form
   8,557.85/12,820.07 = 5,627.27/x
3. Step 3: Cross multiply
   8,557.85x = 12,820.07 × 5,627.27
4. Step 4: Simplify right side
   8,557.85x = 72,142,041.43
5. Step 5: Solve for x
   x = 72,142,041.43/8,557.85
6. Step 6: Final answer
   x = 8,429.92