Finding the Fourth Proportional to 8,071.95, 12,105.57 and 3,140.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,071.95 : 12,105.57 = 3,140.42 : x
2. Step 2: Convert to fraction form
   8,071.95/12,105.57 = 3,140.42/x
3. Step 3: Cross multiply
   8,071.95x = 12,105.57 × 3,140.42
4. Step 4: Simplify right side
   8,071.95x = 38,016,574.14
5. Step 5: Solve for x
   x = 38,016,574.14/8,071.95
6. Step 6: Final answer
   x = 4,709.71