Finding the Fourth Proportional to 1,126.71, 1,554.78 and 629.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126.71 : 1,554.78 = 629.25 : x
2. Step 2: Convert to fraction form
   1,126.71/1,554.78 = 629.25/x
3. Step 3: Cross multiply
   1,126.71x = 1,554.78 × 629.25
4. Step 4: Simplify right side
   1,126.71x = 978,342.17
5. Step 5: Solve for x
   x = 978,342.17/1,126.71
6. Step 6: Final answer
   x = 868.32