Finding the Fourth Proportional to 1,069.37, 1,475.87 and 627.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.37 : 1,475.87 = 627.31 : x
2. Step 2: Convert to fraction form
   1,069.37/1,475.87 = 627.31/x
3. Step 3: Cross multiply
   1,069.37x = 1,475.87 × 627.31
4. Step 4: Simplify right side
   1,069.37x = 925,826.72
5. Step 5: Solve for x
   x = 925,826.72/1,069.37
6. Step 6: Final answer
   x = 865.77