Finding the Fourth Proportional to 1,181.94, 1,631.12 and 684.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.94 : 1,631.12 = 684.57 : x
2. Step 2: Convert to fraction form
   1,181.94/1,631.12 = 684.57/x
3. Step 3: Cross multiply
   1,181.94x = 1,631.12 × 684.57
4. Step 4: Simplify right side
   1,181.94x = 1,116,615.82
5. Step 5: Solve for x
   x = 1,116,615.82/1,181.94
6. Step 6: Final answer
   x = 944.73