Finding the Fourth Proportional to 12,165.30, 18,255.15 and 8,017.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,165.30 : 18,255.15 = 8,017.30 : x
2. Step 2: Convert to fraction form
   12,165.30/18,255.15 = 8,017.30/x
3. Step 3: Cross multiply
   12,165.30x = 18,255.15 × 8,017.30
4. Step 4: Simplify right side
   12,165.30x = 146,357,014.10
5. Step 5: Solve for x
   x = 146,357,014.10/12,165.30
6. Step 6: Final answer
   x = 12,030.70