Finding the Fourth Proportional to 12,022.86, 18,018.60 and 8,702.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,022.86 : 18,018.60 = 8,702.30 : x
2. Step 2: Convert to fraction form
   12,022.86/18,018.60 = 8,702.30/x
3. Step 3: Cross multiply
   12,022.86x = 18,018.60 × 8,702.30
4. Step 4: Simplify right side
   12,022.86x = 156,803,262.78
5. Step 5: Solve for x
   x = 156,803,262.78/12,022.86
6. Step 6: Final answer
   x = 13,042.09