Finding the Fourth Proportional to 12,106.52, 18,142.72 and 9,630.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,106.52 : 18,142.72 = 9,630.32 : x
2. Step 2: Convert to fraction form
   12,106.52/18,142.72 = 9,630.32/x
3. Step 3: Cross multiply
   12,106.52x = 18,142.72 × 9,630.32
4. Step 4: Simplify right side
   12,106.52x = 174,720,199.27
5. Step 5: Solve for x
   x = 174,720,199.27/12,106.52
6. Step 6: Final answer
   x = 14,431.91