Finding the Fourth Proportional to 12,388.37, 17,090.42 and 7,352.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.37 : 17,090.42 = 7,352.80 : x
2. Step 2: Convert to fraction form
   12,388.37/17,090.42 = 7,352.80/x
3. Step 3: Cross multiply
   12,388.37x = 17,090.42 × 7,352.80
4. Step 4: Simplify right side
   12,388.37x = 125,662,360.69
5. Step 5: Solve for x
   x = 125,662,360.69/12,388.37
6. Step 6: Final answer
   x = 10,143.58