Finding the Fourth Proportional to 1,181.72, 1,630.57 and 684.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.72 : 1,630.57 = 684.18 : x
2. Step 2: Convert to fraction form
   1,181.72/1,630.57 = 684.18/x
3. Step 3: Cross multiply
   1,181.72x = 1,630.57 × 684.18
4. Step 4: Simplify right side
   1,181.72x = 1,115,603.38
5. Step 5: Solve for x
   x = 1,115,603.38/1,181.72
6. Step 6: Final answer
   x = 944.05