Finding the Fourth Proportional to 12,387.36, 17,090.37 and 7,078.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.36 : 17,090.37 = 7,078.41 : x
2. Step 2: Convert to fraction form
   12,387.36/17,090.37 = 7,078.41/x
3. Step 3: Cross multiply
   12,387.36x = 17,090.37 × 7,078.41
4. Step 4: Simplify right side
   12,387.36x = 120,972,645.91
5. Step 5: Solve for x
   x = 120,972,645.91/12,387.36
6. Step 6: Final answer
   x = 9,765.81