Finding the Fourth Proportional to 8,055.10, 12,081.66 and 3,121.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,055.10 : 12,081.66 = 3,121.42 : x
2. Step 2: Convert to fraction form
   8,055.10/12,081.66 = 3,121.42/x
3. Step 3: Cross multiply
   8,055.10x = 12,081.66 × 3,121.42
4. Step 4: Simplify right side
   8,055.10x = 37,711,935.16
5. Step 5: Solve for x
   x = 37,711,935.16/8,055.10
6. Step 6: Final answer
   x = 4,681.75