Finding the Fourth Proportional to 1,072.02, 1,479.43 and 629.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.02 : 1,479.43 = 629.92 : x
2. Step 2: Convert to fraction form
   1,072.02/1,479.43 = 629.92/x
3. Step 3: Cross multiply
   1,072.02x = 1,479.43 × 629.92
4. Step 4: Simplify right side
   1,072.02x = 931,917.27
5. Step 5: Solve for x
   x = 931,917.27/1,072.02
6. Step 6: Final answer
   x = 869.31