Finding the Fourth Proportional to 6,816.32, 9,406.56 and 4,021.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,816.32 : 9,406.56 = 4,021.76 : x
2. Step 2: Convert to fraction form
   6,816.32/9,406.56 = 4,021.76/x
3. Step 3: Cross multiply
   6,816.32x = 9,406.56 × 4,021.76
4. Step 4: Simplify right side
   6,816.32x = 37,830,926.75
5. Step 5: Solve for x
   x = 37,830,926.75/6,816.32
6. Step 6: Final answer
   x = 5,550.05