Finding the Fourth Proportional to 7,200.07, 9,940.41 and 5,208.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.07 : 9,940.41 = 5,208.55 : x
2. Step 2: Convert to fraction form
   7,200.07/9,940.41 = 5,208.55/x
3. Step 3: Cross multiply
   7,200.07x = 9,940.41 × 5,208.55
4. Step 4: Simplify right side
   7,200.07x = 51,775,122.51
5. Step 5: Solve for x
   x = 51,775,122.51/7,200.07
6. Step 6: Final answer
   x = 7,190.92