Finding the Fourth Proportional to 8,080.56, 12,109.50 and 5,611.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,080.56 : 12,109.50 = 5,611.68 : x
2. Step 2: Convert to fraction form
   8,080.56/12,109.50 = 5,611.68/x
3. Step 3: Cross multiply
   8,080.56x = 12,109.50 × 5,611.68
4. Step 4: Simplify right side
   8,080.56x = 67,954,638.96
5. Step 5: Solve for x
   x = 67,954,638.96/8,080.56
6. Step 6: Final answer
   x = 8,409.64