Finding the Fourth Proportional to 13,087.89, 18,060.75 and 7,119.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.89 : 18,060.75 = 7,119.56 : x
2. Step 2: Convert to fraction form
   13,087.89/18,060.75 = 7,119.56/x
3. Step 3: Cross multiply
   13,087.89x = 18,060.75 × 7,119.56
4. Step 4: Simplify right side
   13,087.89x = 128,584,542.20
5. Step 5: Solve for x
   x = 128,584,542.20/13,087.89
6. Step 6: Final answer
   x = 9,824.70