Finding the Fourth Proportional to 1,095.89, 1,642.46 and 548.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.89 : 1,642.46 = 548.22 : x
2. Step 2: Convert to fraction form
   1,095.89/1,642.46 = 548.22/x
3. Step 3: Cross multiply
   1,095.89x = 1,642.46 × 548.22
4. Step 4: Simplify right side
   1,095.89x = 900,429.42
5. Step 5: Solve for x
   x = 900,429.42/1,095.89
6. Step 6: Final answer
   x = 821.64