Finding the Fourth Proportional to 1,126.72, 1,554.76 and 629.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,126.72 : 1,554.76 = 629.32 : x
2. Step 2: Convert to fraction form
   1,126.72/1,554.76 = 629.32/x
3. Step 3: Cross multiply
   1,126.72x = 1,554.76 × 629.32
4. Step 4: Simplify right side
   1,126.72x = 978,441.56
5. Step 5: Solve for x
   x = 978,441.56/1,126.72
6. Step 6: Final answer
   x = 868.40