Finding the Fourth Proportional to 10,822.80, 16,211.52 and 5,612.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,822.80 : 16,211.52 = 5,612.88 : x
2. Step 2: Convert to fraction form
   10,822.80/16,211.52 = 5,612.88/x
3. Step 3: Cross multiply
   10,822.80x = 16,211.52 × 5,612.88
4. Step 4: Simplify right side
   10,822.80x = 90,993,316.38
5. Step 5: Solve for x
   x = 90,993,316.38/10,822.80
6. Step 6: Final answer
   x = 8,407.56