Finding the Fourth Proportional to 7,940.42, 10,961.30 and 5,559.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,940.42 : 10,961.30 = 5,559.75 : x
2. Step 2: Convert to fraction form
   7,940.42/10,961.30 = 5,559.75/x
3. Step 3: Cross multiply
   7,940.42x = 10,961.30 × 5,559.75
4. Step 4: Simplify right side
   7,940.42x = 60,942,059.88
5. Step 5: Solve for x
   x = 60,942,059.88/7,940.42
6. Step 6: Final answer
   x = 7,674.92