Finding the Fourth Proportional to 13,087.98, 18,061.11 and 7,119.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.98 : 18,061.11 = 7,119.63 : x
2. Step 2: Convert to fraction form
   13,087.98/18,061.11 = 7,119.63/x
3. Step 3: Cross multiply
   13,087.98x = 18,061.11 × 7,119.63
4. Step 4: Simplify right side
   13,087.98x = 128,588,420.59
5. Step 5: Solve for x
   x = 128,588,420.59/13,087.98
6. Step 6: Final answer
   x = 9,824.92