Finding the Fourth Proportional to 5,238.50, 7,856.93 and 1,728.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,238.50 : 7,856.93 = 1,728.56 : x
2. Step 2: Convert to fraction form
   5,238.50/7,856.93 = 1,728.56/x
3. Step 3: Cross multiply
   5,238.50x = 7,856.93 × 1,728.56
4. Step 4: Simplify right side
   5,238.50x = 13,581,198.88
5. Step 5: Solve for x
   x = 13,581,198.88/5,238.50
6. Step 6: Final answer
   x = 2,592.58