Finding the Fourth Proportional to 1,100.47, 1,518.56 and 628.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.47 : 1,518.56 = 628.41 : x
2. Step 2: Convert to fraction form
   1,100.47/1,518.56 = 628.41/x
3. Step 3: Cross multiply
   1,100.47x = 1,518.56 × 628.41
4. Step 4: Simplify right side
   1,100.47x = 954,275.54
5. Step 5: Solve for x
   x = 954,275.54/1,100.47
6. Step 6: Final answer
   x = 867.15