Finding the Fourth Proportional to 1,100.41, 1,518.45 and 628.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.41 : 1,518.45 = 628.30 : x
2. Step 2: Convert to fraction form
   1,100.41/1,518.45 = 628.30/x
3. Step 3: Cross multiply
   1,100.41x = 1,518.45 × 628.30
4. Step 4: Simplify right side
   1,100.41x = 954,042.14
5. Step 5: Solve for x
   x = 954,042.14/1,100.41
6. Step 6: Final answer
   x = 866.99