Finding the Fourth Proportional to 1,126.77, 1,554.89 and 629.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126.77 : 1,554.89 = 629.39 : x
2. Step 2: Convert to fraction form
   1,126.77/1,554.89 = 629.39/x
3. Step 3: Cross multiply
   1,126.77x = 1,554.89 × 629.39
4. Step 4: Simplify right side
   1,126.77x = 978,632.22
5. Step 5: Solve for x
   x = 978,632.22/1,126.77
6. Step 6: Final answer
   x = 868.53