Finding the Fourth Proportional to 13,209.48, 19,817.28 and 3,849.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,209.48 : 19,817.28 = 3,849.72 : x
2. Step 2: Convert to fraction form
   13,209.48/19,817.28 = 3,849.72/x
3. Step 3: Cross multiply
   13,209.48x = 19,817.28 × 3,849.72
4. Step 4: Simplify right side
   13,209.48x = 76,290,979.16
5. Step 5: Solve for x
   x = 76,290,979.16/13,209.48
6. Step 6: Final answer
   x = 5,775.47