Finding the Fourth Proportional to 18,514.71, 25,523.72 and 13,200.30

Step by Step Solution

1. Step 1: Write the proportion equation
   18,514.71 : 25,523.72 = 13,200.30 : x
2. Step 2: Convert to fraction form
   18,514.71/25,523.72 = 13,200.30/x
3. Step 3: Cross multiply
   18,514.71x = 25,523.72 × 13,200.30
4. Step 4: Simplify right side
   18,514.71x = 336,920,761.12
5. Step 5: Solve for x
   x = 336,920,761.12/18,514.71
6. Step 6: Final answer
   x = 18,197.46