Finding the Fourth Proportional to 12,019.72, 18,020.04 and 7,885.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,019.72 : 18,020.04 = 7,885.48 : x
2. Step 2: Convert to fraction form
   12,019.72/18,020.04 = 7,885.48/x
3. Step 3: Cross multiply
   12,019.72x = 18,020.04 × 7,885.48
4. Step 4: Simplify right side
   12,019.72x = 142,096,665.02
5. Step 5: Solve for x
   x = 142,096,665.02/12,019.72
6. Step 6: Final answer
   x = 11,821.96