Finding the Fourth Proportional to 11,755.72, 16,221.18 and 7,039

Step by Step Solution

1. Step 1: Write the proportion equation
   11,755.72 : 16,221.18 = 7,039 : x
2. Step 2: Convert to fraction form
   11,755.72/16,221.18 = 7,039/x
3. Step 3: Cross multiply
   11,755.72x = 16,221.18 × 7,039
4. Step 4: Simplify right side
   11,755.72x = 114,180,886.02
5. Step 5: Solve for x
   x = 114,180,886.02/11,755.72
6. Step 6: Final answer
   x = 9,712.79