Finding the Fourth Proportional to 12,705.53, 19,058.12 and 3,940.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.53 : 19,058.12 = 3,940.45 : x
2. Step 2: Convert to fraction form
   12,705.53/19,058.12 = 3,940.45/x
3. Step 3: Cross multiply
   12,705.53x = 19,058.12 × 3,940.45
4. Step 4: Simplify right side
   12,705.53x = 75,097,516.38
5. Step 5: Solve for x
   x = 75,097,516.38/12,705.53
6. Step 6: Final answer
   x = 5,910.62