Finding the Fourth Proportional to 1,069.50, 1,475.55 and 627.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.50 : 1,475.55 = 627.42 : x
2. Step 2: Convert to fraction form
   1,069.50/1,475.55 = 627.42/x
3. Step 3: Cross multiply
   1,069.50x = 1,475.55 × 627.42
4. Step 4: Simplify right side
   1,069.50x = 925,789.58
5. Step 5: Solve for x
   x = 925,789.58/1,069.50
6. Step 6: Final answer
   x = 865.63