Finding the Fourth Proportional to 6,908.56, 10,363.16 and 1,978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   6,908.56 : 10,363.16 = 1,978.92 : x
2. Step 2: Convert to fraction form
   6,908.56/10,363.16 = 1,978.92/x
3. Step 3: Cross multiply
   6,908.56x = 10,363.16 × 1,978.92
4. Step 4: Simplify right side
   6,908.56x = 20,507,869.53
5. Step 5: Solve for x
   x = 20,507,869.53/6,908.56
6. Step 6: Final answer
   x = 2,968.47