Finding the Fourth Proportional to 13,221.98, 19,833.72 and 5,325.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,221.98 : 19,833.72 = 5,325.09 : x
2. Step 2: Convert to fraction form
   13,221.98/19,833.72 = 5,325.09/x
3. Step 3: Cross multiply
   13,221.98x = 19,833.72 × 5,325.09
4. Step 4: Simplify right side
   13,221.98x = 105,616,344.03
5. Step 5: Solve for x
   x = 105,616,344.03/13,221.98
6. Step 6: Final answer
   x = 7,987.94