Finding the Fourth Proportional to 7,938.80, 10,960.71 and 5,419.99

Step by Step Solution

1. Step 1: Write the proportion equation
   7,938.80 : 10,960.71 = 5,419.99 : x
2. Step 2: Convert to fraction form
   7,938.80/10,960.71 = 5,419.99/x
3. Step 3: Cross multiply
   7,938.80x = 10,960.71 × 5,419.99
4. Step 4: Simplify right side
   7,938.80x = 59,406,952.29
5. Step 5: Solve for x
   x = 59,406,952.29/7,938.80
6. Step 6: Final answer
   x = 7,483.12