Finding the Fourth Proportional to 1,143.36, 1,715.52 and 630.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.36 : 1,715.52 = 630.72 : x
2. Step 2: Convert to fraction form
   1,143.36/1,715.52 = 630.72/x
3. Step 3: Cross multiply
   1,143.36x = 1,715.52 × 630.72
4. Step 4: Simplify right side
   1,143.36x = 1,082,012.77
5. Step 5: Solve for x
   x = 1,082,012.77/1,143.36
6. Step 6: Final answer
   x = 946.34