Finding the Fourth Proportional to 12,931.94, 17,852.85 and 8,705.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.94 : 17,852.85 = 8,705.22 : x
2. Step 2: Convert to fraction form
   12,931.94/17,852.85 = 8,705.22/x
3. Step 3: Cross multiply
   12,931.94x = 17,852.85 × 8,705.22
4. Step 4: Simplify right side
   12,931.94x = 155,412,986.88
5. Step 5: Solve for x
   x = 155,412,986.88/12,931.94
6. Step 6: Final answer
   x = 12,017.76