Finding the Fourth Proportional to 12,004.06, 18,012.12 and 8,100.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,004.06 : 18,012.12 = 8,100.28 : x
2. Step 2: Convert to fraction form
   12,004.06/18,012.12 = 8,100.28/x
3. Step 3: Cross multiply
   12,004.06x = 18,012.12 × 8,100.28
4. Step 4: Simplify right side
   12,004.06x = 145,903,215.39
5. Step 5: Solve for x
   x = 145,903,215.39/12,004.06
6. Step 6: Final answer
   x = 12,154.49