Finding the Fourth Proportional to 7,399.50, 10,211.31 and 4,087.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,399.50 : 10,211.31 = 4,087.50 : x
2. Step 2: Convert to fraction form
   7,399.50/10,211.31 = 4,087.50/x
3. Step 3: Cross multiply
   7,399.50x = 10,211.31 × 4,087.50
4. Step 4: Simplify right side
   7,399.50x = 41,738,729.63
5. Step 5: Solve for x
   x = 41,738,729.63/7,399.50
6. Step 6: Final answer
   x = 5,640.75