Finding the Fourth Proportional to 1,182.42, 1,631.61 and 684.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.42 : 1,631.61 = 684.98 : x
2. Step 2: Convert to fraction form
   1,182.42/1,631.61 = 684.98/x
3. Step 3: Cross multiply
   1,182.42x = 1,631.61 × 684.98
4. Step 4: Simplify right side
   1,182.42x = 1,117,618.18
5. Step 5: Solve for x
   x = 1,117,618.18/1,182.42
6. Step 6: Final answer
   x = 945.20