Finding the Fourth Proportional to 1,143.12, 1,577.27 and 694.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143.12 : 1,577.27 = 694.89 : x
2. Step 2: Convert to fraction form
   1,143.12/1,577.27 = 694.89/x
3. Step 3: Cross multiply
   1,143.12x = 1,577.27 × 694.89
4. Step 4: Simplify right side
   1,143.12x = 1,096,030.89
5. Step 5: Solve for x
   x = 1,096,030.89/1,143.12
6. Step 6: Final answer
   x = 958.80