Finding the Fourth Proportional to 3,939.72, 5,910.21 and 1,342.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.72 : 5,910.21 = 1,342.50 : x
2. Step 2: Convert to fraction form
   3,939.72/5,910.21 = 1,342.50/x
3. Step 3: Cross multiply
   3,939.72x = 5,910.21 × 1,342.50
4. Step 4: Simplify right side
   3,939.72x = 7,934,456.93
5. Step 5: Solve for x
   x = 7,934,456.93/3,939.72
6. Step 6: Final answer
   x = 2,013.96