Finding the Fourth Proportional to 1,019.79, 1,525.37 and 628.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.79 : 1,525.37 = 628.83 : x
2. Step 2: Convert to fraction form
   1,019.79/1,525.37 = 628.83/x
3. Step 3: Cross multiply
   1,019.79x = 1,525.37 × 628.83
4. Step 4: Simplify right side
   1,019.79x = 959,195.27
5. Step 5: Solve for x
   x = 959,195.27/1,019.79
6. Step 6: Final answer
   x = 940.58