Finding the Fourth Proportional to 1,072.03, 1,479.42 and 629.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.03 : 1,479.42 = 629.94 : x
2. Step 2: Convert to fraction form
   1,072.03/1,479.42 = 629.94/x
3. Step 3: Cross multiply
   1,072.03x = 1,479.42 × 629.94
4. Step 4: Simplify right side
   1,072.03x = 931,942.69
5. Step 5: Solve for x
   x = 931,942.69/1,072.03
6. Step 6: Final answer
   x = 869.33