Finding the Fourth Proportional to 12,687.22, 17,510.44 and 8,705.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.22 : 17,510.44 = 8,705.06 : x
2. Step 2: Convert to fraction form
   12,687.22/17,510.44 = 8,705.06/x
3. Step 3: Cross multiply
   12,687.22x = 17,510.44 × 8,705.06
4. Step 4: Simplify right side
   12,687.22x = 152,429,430.83
5. Step 5: Solve for x
   x = 152,429,430.83/12,687.22
6. Step 6: Final answer
   x = 12,014.41