Finding the Fourth Proportional to 12,010.96, 18,036.42 and 7,423.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,010.96 : 18,036.42 = 7,423.12 : x
2. Step 2: Convert to fraction form
   12,010.96/18,036.42 = 7,423.12/x
3. Step 3: Cross multiply
   12,010.96x = 18,036.42 × 7,423.12
4. Step 4: Simplify right side
   12,010.96x = 133,886,510.03
5. Step 5: Solve for x
   x = 133,886,510.03/12,010.96
6. Step 6: Final answer
   x = 11,147.03