Finding the Fourth Proportional to 13,208.72, 19,819.53 and 5,812.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,208.72 : 19,819.53 = 5,812.25 : x
2. Step 2: Convert to fraction form
   13,208.72/19,819.53 = 5,812.25/x
3. Step 3: Cross multiply
   13,208.72x = 19,819.53 × 5,812.25
4. Step 4: Simplify right side
   13,208.72x = 115,196,016.67
5. Step 5: Solve for x
   x = 115,196,016.67/13,208.72
6. Step 6: Final answer
   x = 8,721.21