Finding the Fourth Proportional to 8,510.90, 12,680.80 and 8,033.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,510.90 : 12,680.80 = 8,033.42 : x
2. Step 2: Convert to fraction form
   8,510.90/12,680.80 = 8,033.42/x
3. Step 3: Cross multiply
   8,510.90x = 12,680.80 × 8,033.42
4. Step 4: Simplify right side
   8,510.90x = 101,870,192.34
5. Step 5: Solve for x
   x = 101,870,192.34/8,510.90
6. Step 6: Final answer
   x = 11,969.38