Finding the Fourth Proportional to 7,009.07, 9,672.53 and 3,865.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,009.07 : 9,672.53 = 3,865.28 : x
2. Step 2: Convert to fraction form
   7,009.07/9,672.53 = 3,865.28/x
3. Step 3: Cross multiply
   7,009.07x = 9,672.53 × 3,865.28
4. Step 4: Simplify right side
   7,009.07x = 37,386,969.07
5. Step 5: Solve for x
   x = 37,386,969.07/7,009.07
6. Step 6: Final answer
   x = 5,334.09