Finding the Fourth Proportional to 13,087.37, 18,060.98 and 7,118.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.37 : 18,060.98 = 7,118.69 : x
2. Step 2: Convert to fraction form
   13,087.37/18,060.98 = 7,118.69/x
3. Step 3: Cross multiply
   13,087.37x = 18,060.98 × 7,118.69
4. Step 4: Simplify right side
   13,087.37x = 128,570,391.82
5. Step 5: Solve for x
   x = 128,570,391.82/13,087.37
6. Step 6: Final answer
   x = 9,824.00