Finding the Fourth Proportional to 1,069.47, 1,475.01 and 627.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.47 : 1,475.01 = 627.21 : x
2. Step 2: Convert to fraction form
   1,069.47/1,475.01 = 627.21/x
3. Step 3: Cross multiply
   1,069.47x = 1,475.01 × 627.21
4. Step 4: Simplify right side
   1,069.47x = 925,141.02
5. Step 5: Solve for x
   x = 925,141.02/1,069.47
6. Step 6: Final answer
   x = 865.05