Finding the Fourth Proportional to 9,106.12, 12,485.04 and 8,994.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,106.12 : 12,485.04 = 8,994.04 : x
2. Step 2: Convert to fraction form
   9,106.12/12,485.04 = 8,994.04/x
3. Step 3: Cross multiply
   9,106.12x = 12,485.04 × 8,994.04
4. Step 4: Simplify right side
   9,106.12x = 112,290,884.22
5. Step 5: Solve for x
   x = 112,290,884.22/9,106.12
6. Step 6: Final answer
   x = 12,331.36