Finding the Fourth Proportional to 6,908.69, 10,362.99 and 1,978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   6,908.69 : 10,362.99 = 1,978.34 : x
2. Step 2: Convert to fraction form
   6,908.69/10,362.99 = 1,978.34/x
3. Step 3: Cross multiply
   6,908.69x = 10,362.99 × 1,978.34
4. Step 4: Simplify right side
   6,908.69x = 20,501,543.54
5. Step 5: Solve for x
   x = 20,501,543.54/6,908.69
6. Step 6: Final answer
   x = 2,967.50