Finding the Fourth Proportional to 1,388.82, 1,914.64 and 968.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.82 : 1,914.64 = 968.56 : x
2. Step 2: Convert to fraction form
   1,388.82/1,914.64 = 968.56/x
3. Step 3: Cross multiply
   1,388.82x = 1,914.64 × 968.56
4. Step 4: Simplify right side
   1,388.82x = 1,854,443.72
5. Step 5: Solve for x
   x = 1,854,443.72/1,388.82
6. Step 6: Final answer
   x = 1,335.27