Finding the Fourth Proportional to 12,018.06, 18,030.34 and 10,861.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,018.06 : 18,030.34 = 10,861.38 : x
2. Step 2: Convert to fraction form
   12,018.06/18,030.34 = 10,861.38/x
3. Step 3: Cross multiply
   12,018.06x = 18,030.34 × 10,861.38
4. Step 4: Simplify right side
   12,018.06x = 195,834,374.27
5. Step 5: Solve for x
   x = 195,834,374.27/12,018.06
6. Step 6: Final answer
   x = 16,295.01