Finding the Fourth Proportional to 12,705.66, 19,061.46 and 3,940.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.66 : 19,061.46 = 3,940.11 : x
2. Step 2: Convert to fraction form
   12,705.66/19,061.46 = 3,940.11/x
3. Step 3: Cross multiply
   12,705.66x = 19,061.46 × 3,940.11
4. Step 4: Simplify right side
   12,705.66x = 75,104,249.16
5. Step 5: Solve for x
   x = 75,104,249.16/12,705.66
6. Step 6: Final answer
   x = 5,911.09