Finding the Fourth Proportional to 7,960.76, 10,982.56 and 5,438.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,960.76 : 10,982.56 = 5,438.80 : x
2. Step 2: Convert to fraction form
   7,960.76/10,982.56 = 5,438.80/x
3. Step 3: Cross multiply
   7,960.76x = 10,982.56 × 5,438.80
4. Step 4: Simplify right side
   7,960.76x = 59,731,947.33
5. Step 5: Solve for x
   x = 59,731,947.33/7,960.76
6. Step 6: Final answer
   x = 7,503.30