Finding the Fourth Proportional to 12,705.12, 19,058.22 and 3,945.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,705.12 : 19,058.22 = 3,945.96 : x
2. Step 2: Convert to fraction form
   12,705.12/19,058.22 = 3,945.96/x
3. Step 3: Cross multiply
   12,705.12x = 19,058.22 × 3,945.96
4. Step 4: Simplify right side
   12,705.12x = 75,202,973.79
5. Step 5: Solve for x
   x = 75,202,973.79/12,705.12
6. Step 6: Final answer
   x = 5,919.11