Finding the Fourth Proportional to 12,703.30, 19,058.73 and 3,939.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,703.30 : 19,058.73 = 3,939.10 : x
2. Step 2: Convert to fraction form
   12,703.30/19,058.73 = 3,939.10/x
3. Step 3: Cross multiply
   12,703.30x = 19,058.73 × 3,939.10
4. Step 4: Simplify right side
   12,703.30x = 75,074,243.34
5. Step 5: Solve for x
   x = 75,074,243.34/12,703.30
6. Step 6: Final answer
   x = 5,909.82