Finding the Fourth Proportional to 6,936.28, 9,572.03 and 3,911.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,936.28 : 9,572.03 = 3,911.72 : x
2. Step 2: Convert to fraction form
   6,936.28/9,572.03 = 3,911.72/x
3. Step 3: Cross multiply
   6,936.28x = 9,572.03 × 3,911.72
4. Step 4: Simplify right side
   6,936.28x = 37,443,084.34
5. Step 5: Solve for x
   x = 37,443,084.34/6,936.28
6. Step 6: Final answer
   x = 5,398.15