Finding the Fourth Proportional to 6,211.31, 9,315.12 and 3,288.02

Step by Step Solution

1. Step 1: Write the proportion equation
   6,211.31 : 9,315.12 = 3,288.02 : x
2. Step 2: Convert to fraction form
   6,211.31/9,315.12 = 3,288.02/x
3. Step 3: Cross multiply
   6,211.31x = 9,315.12 × 3,288.02
4. Step 4: Simplify right side
   6,211.31x = 30,628,300.86
5. Step 5: Solve for x
   x = 30,628,300.86/6,211.31
6. Step 6: Final answer
   x = 4,931.05