Finding the Fourth Proportional to 8,809, 12,156.42 and 5,085.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,809 : 12,156.42 = 5,085.16 : x
2. Step 2: Convert to fraction form
   8,809/12,156.42 = 5,085.16/x
3. Step 3: Cross multiply
   8,809x = 12,156.42 × 5,085.16
4. Step 4: Simplify right side
   8,809x = 61,817,340.73
5. Step 5: Solve for x
   x = 61,817,340.73/8,809
6. Step 6: Final answer
   x = 7,017.52