Finding the Fourth Proportional to 13,086.45, 18,059.17 and 7,118.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,086.45 : 18,059.17 = 7,118.12 : x
2. Step 2: Convert to fraction form
   13,086.45/18,059.17 = 7,118.12/x
3. Step 3: Cross multiply
   13,086.45x = 18,059.17 × 7,118.12
4. Step 4: Simplify right side
   13,086.45x = 128,547,222.85
5. Step 5: Solve for x
   x = 128,547,222.85/13,086.45
6. Step 6: Final answer
   x = 9,822.93