Finding the Fourth Proportional to 6,921.76, 10,382.72 and 1,727.68

Step by Step Solution

1. Step 1: Write the proportion equation
   6,921.76 : 10,382.72 = 1,727.68 : x
2. Step 2: Convert to fraction form
   6,921.76/10,382.72 = 1,727.68/x
3. Step 3: Cross multiply
   6,921.76x = 10,382.72 × 1,727.68
4. Step 4: Simplify right side
   6,921.76x = 17,938,017.69
5. Step 5: Solve for x
   x = 17,938,017.69/6,921.76
6. Step 6: Final answer
   x = 2,591.54