Finding the Fourth Proportional to 13,238.72, 19,860.48 and 4,473.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,238.72 : 19,860.48 = 4,473.96 : x
2. Step 2: Convert to fraction form
   13,238.72/19,860.48 = 4,473.96/x
3. Step 3: Cross multiply
   13,238.72x = 19,860.48 × 4,473.96
4. Step 4: Simplify right side
   13,238.72x = 88,854,993.10
5. Step 5: Solve for x
   x = 88,854,993.10/13,238.72
6. Step 6: Final answer
   x = 6,711.75