Finding the Fourth Proportional to 13,839.68, 19,098.18 and 7,870.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.68 : 19,098.18 = 7,870.52 : x
2. Step 2: Convert to fraction form
   13,839.68/19,098.18 = 7,870.52/x
3. Step 3: Cross multiply
   13,839.68x = 19,098.18 × 7,870.52
4. Step 4: Simplify right side
   13,839.68x = 150,312,607.65
5. Step 5: Solve for x
   x = 150,312,607.65/13,839.68
6. Step 6: Final answer
   x = 10,860.99