Finding the Fourth Proportional to 1,095.82, 1,642.62 and 518.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.82 : 1,642.62 = 518.02 : x
2. Step 2: Convert to fraction form
   1,095.82/1,642.62 = 518.02/x
3. Step 3: Cross multiply
   1,095.82x = 1,642.62 × 518.02
4. Step 4: Simplify right side
   1,095.82x = 850,910.01
5. Step 5: Solve for x
   x = 850,910.01/1,095.82
6. Step 6: Final answer
   x = 776.51