Finding the Fourth Proportional to 1,078.42, 1,616.86 and 530.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.42 : 1,616.86 = 530.47 : x
2. Step 2: Convert to fraction form
   1,078.42/1,616.86 = 530.47/x
3. Step 3: Cross multiply
   1,078.42x = 1,616.86 × 530.47
4. Step 4: Simplify right side
   1,078.42x = 857,695.72
5. Step 5: Solve for x
   x = 857,695.72/1,078.42
6. Step 6: Final answer
   x = 795.33