Finding the Fourth Proportional to 1,078.79, 1,618.38 and 530.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.79 : 1,618.38 = 530.82 : x
2. Step 2: Convert to fraction form
   1,078.79/1,618.38 = 530.82/x
3. Step 3: Cross multiply
   1,078.79x = 1,618.38 × 530.82
4. Step 4: Simplify right side
   1,078.79x = 859,068.47
5. Step 5: Solve for x
   x = 859,068.47/1,078.79
6. Step 6: Final answer
   x = 796.33