Finding the Fourth Proportional to 13,839.76, 19,099.98 and 7,873.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.76 : 19,099.98 = 7,873.24 : x
2. Step 2: Convert to fraction form
   13,839.76/19,099.98 = 7,873.24/x
3. Step 3: Cross multiply
   13,839.76x = 19,099.98 × 7,873.24
4. Step 4: Simplify right side
   13,839.76x = 150,378,726.54
5. Step 5: Solve for x
   x = 150,378,726.54/13,839.76
6. Step 6: Final answer
   x = 10,865.70