Finding the Fourth Proportional to 13,013.89, 19,517.91 and 5,987.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,013.89 : 19,517.91 = 5,987.16 : x
2. Step 2: Convert to fraction form
   13,013.89/19,517.91 = 5,987.16/x
3. Step 3: Cross multiply
   13,013.89x = 19,517.91 × 5,987.16
4. Step 4: Simplify right side
   13,013.89x = 116,856,827.58
5. Step 5: Solve for x
   x = 116,856,827.58/13,013.89
6. Step 6: Final answer
   x = 8,979.39