Finding the Fourth Proportional to 13,229.76, 19,846.49 and 3,870.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,229.76 : 19,846.49 = 3,870.47 : x
2. Step 2: Convert to fraction form
   13,229.76/19,846.49 = 3,870.47/x
3. Step 3: Cross multiply
   13,229.76x = 19,846.49 × 3,870.47
4. Step 4: Simplify right side
   13,229.76x = 76,815,125.57
5. Step 5: Solve for x
   x = 76,815,125.57/13,229.76
6. Step 6: Final answer
   x = 5,806.24