Finding the Fourth Proportional to 13,839.07, 19,096.59 and 7,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.07 : 19,096.59 = 7,870.42 : x
2. Step 2: Convert to fraction form
   13,839.07/19,096.59 = 7,870.42/x
3. Step 3: Cross multiply
   13,839.07x = 19,096.59 × 7,870.42
4. Step 4: Simplify right side
   13,839.07x = 150,298,183.87
5. Step 5: Solve for x
   x = 150,298,183.87/13,839.07
6. Step 6: Final answer
   x = 10,860.43