Finding the Fourth Proportional to 1,100.64, 1,518.94 and 628.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.64 : 1,518.94 = 628.58 : x
2. Step 2: Convert to fraction form
   1,100.64/1,518.94 = 628.58/x
3. Step 3: Cross multiply
   1,100.64x = 1,518.94 × 628.58
4. Step 4: Simplify right side
   1,100.64x = 954,775.31
5. Step 5: Solve for x
   x = 954,775.31/1,100.64
6. Step 6: Final answer
   x = 867.47