Finding the Fourth Proportional to 1,069.82, 1,476.34 and 628.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.82 : 1,476.34 = 628.10 : x
2. Step 2: Convert to fraction form
   1,069.82/1,476.34 = 628.10/x
3. Step 3: Cross multiply
   1,069.82x = 1,476.34 × 628.10
4. Step 4: Simplify right side
   1,069.82x = 927,289.15
5. Step 5: Solve for x
   x = 927,289.15/1,069.82
6. Step 6: Final answer
   x = 866.77