Finding the Fourth Proportional to 7,009.18, 9,672.72 and 3,865.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,009.18 : 9,672.72 = 3,865.48 : x
2. Step 2: Convert to fraction form
   7,009.18/9,672.72 = 3,865.48/x
3. Step 3: Cross multiply
   7,009.18x = 9,672.72 × 3,865.48
4. Step 4: Simplify right side
   7,009.18x = 37,389,705.71
5. Step 5: Solve for x
   x = 37,389,705.71/7,009.18
6. Step 6: Final answer
   x = 5,334.39