Finding the Fourth Proportional to 13,016.67, 19,509.57 and 5,990.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.67 : 19,509.57 = 5,990.85 : x
2. Step 2: Convert to fraction form
   13,016.67/19,509.57 = 5,990.85/x
3. Step 3: Cross multiply
   13,016.67x = 19,509.57 × 5,990.85
4. Step 4: Simplify right side
   13,016.67x = 116,878,907.43
5. Step 5: Solve for x
   x = 116,878,907.43/13,016.67
6. Step 6: Final answer
   x = 8,979.17