Finding the Fourth Proportional to 7,209.88, 9,945.59 and 4,225.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,209.88 : 9,945.59 = 4,225.10 : x
2. Step 2: Convert to fraction form
   7,209.88/9,945.59 = 4,225.10/x
3. Step 3: Cross multiply
   7,209.88x = 9,945.59 × 4,225.10
4. Step 4: Simplify right side
   7,209.88x = 42,021,041.46
5. Step 5: Solve for x
   x = 42,021,041.46/7,209.88
6. Step 6: Final answer
   x = 5,828.26