Finding the Fourth Proportional to 10,828.56, 16,212.88 and 5,552.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,828.56 : 16,212.88 = 5,552.20 : x
2. Step 2: Convert to fraction form
   10,828.56/16,212.88 = 5,552.20/x
3. Step 3: Cross multiply
   10,828.56x = 16,212.88 × 5,552.20
4. Step 4: Simplify right side
   10,828.56x = 90,017,152.34
5. Step 5: Solve for x
   x = 90,017,152.34/10,828.56
6. Step 6: Final answer
   x = 8,312.94