Finding the Fourth Proportional to 5,173.50, 7,139.43 and 2,965.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,173.50 : 7,139.43 = 2,965.50 : x
2. Step 2: Convert to fraction form
   5,173.50/7,139.43 = 2,965.50/x
3. Step 3: Cross multiply
   5,173.50x = 7,139.43 × 2,965.50
4. Step 4: Simplify right side
   5,173.50x = 21,171,979.67
5. Step 5: Solve for x
   x = 21,171,979.67/5,173.50
6. Step 6: Final answer
   x = 4,092.39