Finding the Fourth Proportional to 13,308.52, 19,958.72 and 5,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.52 : 19,958.72 = 5,515.50 : x
2. Step 2: Convert to fraction form
   13,308.52/19,958.72 = 5,515.50/x
3. Step 3: Cross multiply
   13,308.52x = 19,958.72 × 5,515.50
4. Step 4: Simplify right side
   13,308.52x = 110,082,320.16
5. Step 5: Solve for x
   x = 110,082,320.16/13,308.52
6. Step 6: Final answer
   x = 8,271.57