Finding the Fourth Proportional to 13,106.24, 18,086.82 and 7,138.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,106.24 : 18,086.82 = 7,138.02 : x
2. Step 2: Convert to fraction form
   13,106.24/18,086.82 = 7,138.02/x
3. Step 3: Cross multiply
   13,106.24x = 18,086.82 × 7,138.02
4. Step 4: Simplify right side
   13,106.24x = 129,104,082.90
5. Step 5: Solve for x
   x = 129,104,082.90/13,106.24
6. Step 6: Final answer
   x = 9,850.58