Finding the Fourth Proportional to 1,078.32, 1,617.48 and 308.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.32 : 1,617.48 = 308.82 : x
2. Step 2: Convert to fraction form
   1,078.32/1,617.48 = 308.82/x
3. Step 3: Cross multiply
   1,078.32x = 1,617.48 × 308.82
4. Step 4: Simplify right side
   1,078.32x = 499,510.17
5. Step 5: Solve for x
   x = 499,510.17/1,078.32
6. Step 6: Final answer
   x = 463.23