Finding the Fourth Proportional to 12,336.66, 17,019.81 and 7,859.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,336.66 : 17,019.81 = 7,859.61 : x
2. Step 2: Convert to fraction form
   12,336.66/17,019.81 = 7,859.61/x
3. Step 3: Cross multiply
   12,336.66x = 17,019.81 × 7,859.61
4. Step 4: Simplify right side
   12,336.66x = 133,769,068.87
5. Step 5: Solve for x
   x = 133,769,068.87/12,336.66
6. Step 6: Final answer
   x = 10,843.22