Finding the Fourth Proportional to 13,839.18, 19,097.49 and 7,870.02

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.18 : 19,097.49 = 7,870.02 : x
2. Step 2: Convert to fraction form
   13,839.18/19,097.49 = 7,870.02/x
3. Step 3: Cross multiply
   13,839.18x = 19,097.49 × 7,870.02
4. Step 4: Simplify right side
   13,839.18x = 150,297,628.25
5. Step 5: Solve for x
   x = 150,297,628.25/13,839.18
6. Step 6: Final answer
   x = 10,860.30