Finding the Fourth Proportional to 8,994.09, 12,420.40 and 8,503.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,994.09 : 12,420.40 = 8,503.23 : x
2. Step 2: Convert to fraction form
   8,994.09/12,420.40 = 8,503.23/x
3. Step 3: Cross multiply
   8,994.09x = 12,420.40 × 8,503.23
4. Step 4: Simplify right side
   8,994.09x = 105,613,517.89
5. Step 5: Solve for x
   x = 105,613,517.89/8,994.09
6. Step 6: Final answer
   x = 11,742.55