Finding the Fourth Proportional to 1,127.05, 1,555.25 and 629.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.05 : 1,555.25 = 629.59 : x
2. Step 2: Convert to fraction form
   1,127.05/1,555.25 = 629.59/x
3. Step 3: Cross multiply
   1,127.05x = 1,555.25 × 629.59
4. Step 4: Simplify right side
   1,127.05x = 979,162.81
5. Step 5: Solve for x
   x = 979,162.81/1,127.05
6. Step 6: Final answer
   x = 868.79