Finding the Fourth Proportional to 1,140.42, 1,573.74 and 674.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,140.42 : 1,573.74 = 674.58 : x
2. Step 2: Convert to fraction form
   1,140.42/1,573.74 = 674.58/x
3. Step 3: Cross multiply
   1,140.42x = 1,573.74 × 674.58
4. Step 4: Simplify right side
   1,140.42x = 1,061,613.53
5. Step 5: Solve for x
   x = 1,061,613.53/1,140.42
6. Step 6: Final answer
   x = 930.90