Finding the Fourth Proportional to 12,008.92, 18,019.72 and 8,521.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,008.92 : 18,019.72 = 8,521.46 : x
2. Step 2: Convert to fraction form
   12,008.92/18,019.72 = 8,521.46/x
3. Step 3: Cross multiply
   12,008.92x = 18,019.72 × 8,521.46
4. Step 4: Simplify right side
   12,008.92x = 153,554,323.19
5. Step 5: Solve for x
   x = 153,554,323.19/12,008.92
6. Step 6: Final answer
   x = 12,786.69