Finding the Fourth Proportional to 12,071.72, 16,661.04 and 7,038.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,071.72 : 16,661.04 = 7,038.89 : x
2. Step 2: Convert to fraction form
   12,071.72/16,661.04 = 7,038.89/x
3. Step 3: Cross multiply
   12,071.72x = 16,661.04 × 7,038.89
4. Step 4: Simplify right side
   12,071.72x = 117,275,144.54
5. Step 5: Solve for x
   x = 117,275,144.54/12,071.72
6. Step 6: Final answer
   x = 9,714.87