Finding the Fourth Proportional to 8,485.88, 12,741.84 and 8,111.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.88 : 12,741.84 = 8,111.52 : x
2. Step 2: Convert to fraction form
   8,485.88/12,741.84 = 8,111.52/x
3. Step 3: Cross multiply
   8,485.88x = 12,741.84 × 8,111.52
4. Step 4: Simplify right side
   8,485.88x = 103,355,690.00
5. Step 5: Solve for x
   x = 103,355,690.00/8,485.88
6. Step 6: Final answer
   x = 12,179.73