Finding the Fourth Proportional to 12,383.60, 17,090.88 and 7,078.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,383.60 : 17,090.88 = 7,078.64 : x
2. Step 2: Convert to fraction form
   12,383.60/17,090.88 = 7,078.64/x
3. Step 3: Cross multiply
   12,383.60x = 17,090.88 × 7,078.64
4. Step 4: Simplify right side
   12,383.60x = 120,980,186.80
5. Step 5: Solve for x
   x = 120,980,186.80/12,383.60
6. Step 6: Final answer
   x = 9,769.39