Finding the Fourth Proportional to 1,126.76, 1,554.89 and 629.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126.76 : 1,554.89 = 629.42 : x
2. Step 2: Convert to fraction form
   1,126.76/1,554.89 = 629.42/x
3. Step 3: Cross multiply
   1,126.76x = 1,554.89 × 629.42
4. Step 4: Simplify right side
   1,126.76x = 978,667.94
5. Step 5: Solve for x
   x = 978,667.94/1,126.76
6. Step 6: Final answer
   x = 868.57