Finding the Fourth Proportional to 1,100.94, 1,519.34 and 628.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.94 : 1,519.34 = 628.88 : x
2. Step 2: Convert to fraction form
   1,100.94/1,519.34 = 628.88/x
3. Step 3: Cross multiply
   1,100.94x = 1,519.34 × 628.88
4. Step 4: Simplify right side
   1,100.94x = 955,479.39
5. Step 5: Solve for x
   x = 955,479.39/1,100.94
6. Step 6: Final answer
   x = 867.88