Finding the Fourth Proportional to 12,384.16, 17,090.16 and 7,078.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,384.16 : 17,090.16 = 7,078.96 : x
2. Step 2: Convert to fraction form
   12,384.16/17,090.16 = 7,078.96/x
3. Step 3: Cross multiply
   12,384.16x = 17,090.16 × 7,078.96
4. Step 4: Simplify right side
   12,384.16x = 120,980,559.03
5. Step 5: Solve for x
   x = 120,980,559.03/12,384.16
6. Step 6: Final answer
   x = 9,768.98