Finding the Fourth Proportional to 12,990.37, 17,914.94 and 8,512.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990.37 : 17,914.94 = 8,512.49 : x
2. Step 2: Convert to fraction form
   12,990.37/17,914.94 = 8,512.49/x
3. Step 3: Cross multiply
   12,990.37x = 17,914.94 × 8,512.49
4. Step 4: Simplify right side
   12,990.37x = 152,500,705.04
5. Step 5: Solve for x
   x = 152,500,705.04/12,990.37
6. Step 6: Final answer
   x = 11,739.52