Finding the Fourth Proportional to 1,078.84, 1,618.14 and 309.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.84 : 1,618.14 = 309.34 : x
2. Step 2: Convert to fraction form
   1,078.84/1,618.14 = 309.34/x
3. Step 3: Cross multiply
   1,078.84x = 1,618.14 × 309.34
4. Step 4: Simplify right side
   1,078.84x = 500,555.43
5. Step 5: Solve for x
   x = 500,555.43/1,078.84
6. Step 6: Final answer
   x = 463.98