Finding the Fourth Proportional to 11,661.72, 17,499.84 and 5,088

Step by Step Solution

1. Step 1: Write the proportion equation
   11,661.72 : 17,499.84 = 5,088 : x
2. Step 2: Convert to fraction form
   11,661.72/17,499.84 = 5,088/x
3. Step 3: Cross multiply
   11,661.72x = 17,499.84 × 5,088
4. Step 4: Simplify right side
   11,661.72x = 89,039,185.92
5. Step 5: Solve for x
   x = 89,039,185.92/11,661.72
6. Step 6: Final answer
   x = 7,635.17