Finding the Fourth Proportional to 8,706.65, 12,014.69 and 5,121.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,706.65 : 12,014.69 = 5,121.05 : x
2. Step 2: Convert to fraction form
   8,706.65/12,014.69 = 5,121.05/x
3. Step 3: Cross multiply
   8,706.65x = 12,014.69 × 5,121.05
4. Step 4: Simplify right side
   8,706.65x = 61,527,742.55
5. Step 5: Solve for x
   x = 61,527,742.55/8,706.65
6. Step 6: Final answer
   x = 7,066.76