Finding the Fourth Proportional to 9,142.21, 12,622.35 and 8,514.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.21 : 12,622.35 = 8,514.35 : x
2. Step 2: Convert to fraction form
   9,142.21/12,622.35 = 8,514.35/x
3. Step 3: Cross multiply
   9,142.21x = 12,622.35 × 8,514.35
4. Step 4: Simplify right side
   9,142.21x = 107,471,105.72
5. Step 5: Solve for x
   x = 107,471,105.72/9,142.21
6. Step 6: Final answer
   x = 11,755.49