Finding the Fourth Proportional to 1,100.50, 1,518.74 and 628.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.50 : 1,518.74 = 628.54 : x
2. Step 2: Convert to fraction form
   1,100.50/1,518.74 = 628.54/x
3. Step 3: Cross multiply
   1,100.50x = 1,518.74 × 628.54
4. Step 4: Simplify right side
   1,100.50x = 954,588.84
5. Step 5: Solve for x
   x = 954,588.84/1,100.50
6. Step 6: Final answer
   x = 867.41