Finding the Fourth Proportional to 13,019.49, 17,975.81 and 8,310.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,019.49 : 17,975.81 = 8,310.15 : x
2. Step 2: Convert to fraction form
   13,019.49/17,975.81 = 8,310.15/x
3. Step 3: Cross multiply
   13,019.49x = 17,975.81 × 8,310.15
4. Step 4: Simplify right side
   13,019.49x = 149,381,698.25
5. Step 5: Solve for x
   x = 149,381,698.25/13,019.49
6. Step 6: Final answer
   x = 11,473.70