Finding the Fourth Proportional to 12,931.83, 17,852.76 and 8,705.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.83 : 17,852.76 = 8,705.12 : x
2. Step 2: Convert to fraction form
   12,931.83/17,852.76 = 8,705.12/x
3. Step 3: Cross multiply
   12,931.83x = 17,852.76 × 8,705.12
4. Step 4: Simplify right side
   12,931.83x = 155,410,328.87
5. Step 5: Solve for x
   x = 155,410,328.87/12,931.83
6. Step 6: Final answer
   x = 12,017.66