Finding the Fourth Proportional to 11,665.08, 17,489.88 and 6,111.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,665.08 : 17,489.88 = 6,111.72 : x
2. Step 2: Convert to fraction form
   11,665.08/17,489.88 = 6,111.72/x
3. Step 3: Cross multiply
   11,665.08x = 17,489.88 × 6,111.72
4. Step 4: Simplify right side
   11,665.08x = 106,893,249.39
5. Step 5: Solve for x
   x = 106,893,249.39/11,665.08
6. Step 6: Final answer
   x = 9,163.52