Finding the Fourth Proportional to 13,189.18, 18,200.12 and 7,524.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,189.18 : 18,200.12 = 7,524.16 : x
2. Step 2: Convert to fraction form
   13,189.18/18,200.12 = 7,524.16/x
3. Step 3: Cross multiply
   13,189.18x = 18,200.12 × 7,524.16
4. Step 4: Simplify right side
   13,189.18x = 136,940,614.90
5. Step 5: Solve for x
   x = 136,940,614.90/13,189.18
6. Step 6: Final answer
   x = 10,382.80