Finding the Fourth Proportional to 7,200.30, 9,940.34 and 4,974.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.30 : 9,940.34 = 4,974.15 : x
2. Step 2: Convert to fraction form
   7,200.30/9,940.34 = 4,974.15/x
3. Step 3: Cross multiply
   7,200.30x = 9,940.34 × 4,974.15
4. Step 4: Simplify right side
   7,200.30x = 49,444,717.34
5. Step 5: Solve for x
   x = 49,444,717.34/7,200.30
6. Step 6: Final answer
   x = 6,867.04