Finding the Fourth Proportional to 12,087.13, 18,049.31 and 9,870.29

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.13 : 18,049.31 = 9,870.29 : x
2. Step 2: Convert to fraction form
   12,087.13/18,049.31 = 9,870.29/x
3. Step 3: Cross multiply
   12,087.13x = 18,049.31 × 9,870.29
4. Step 4: Simplify right side
   12,087.13x = 178,151,924.00
5. Step 5: Solve for x
   x = 178,151,924.00/12,087.13
6. Step 6: Final answer
   x = 14,738.98