Finding the Fourth Proportional to 12,705.42, 19,058.52 and 3,940.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.42 : 19,058.52 = 3,940.38 : x
2. Step 2: Convert to fraction form
   12,705.42/19,058.52 = 3,940.38/x
3. Step 3: Cross multiply
   12,705.42x = 19,058.52 × 3,940.38
4. Step 4: Simplify right side
   12,705.42x = 75,097,811.04
5. Step 5: Solve for x
   x = 75,097,811.04/12,705.42
6. Step 6: Final answer
   x = 5,910.69